my minecraft stuck at preparing.

[Goodjonx]

[11:48:41 INFO]: Minecraft Launcher 1.6.89-j (through bootstrap 5) started on linux...
[11:48:41 INFO]: Current time is Dec 22, 2019, 11:48:41 AM
[11:48:41 INFO]: System.getProperty('os.name') == 'Linux'
[11:48:41 INFO]: System.getProperty('os.version') == '4.15.0-72-generic'
[11:48:41 INFO]: System.getProperty('os.arch') == 'amd64'
[11:48:41 INFO]: System.getProperty('java.version') == '10.0.2'
[11:48:41 INFO]: System.getProperty('java.vendor') == 'Oracle Corporation'
[11:48:41 INFO]: System.getProperty('sun.arch.data.model') == '64'
[11:48:41 INFO]: proxy == DIRECT
[11:48:41 INFO]: JFX is already initialized
[11:48:41 INFO]: Refreshing local version list...
[11:48:41 ERROR]: Couldn't load local version /home/goodjonx/.minecraft/versions/1.14.4/1.14.4.json
com.google.gson.JsonSyntaxException: duplicate key: null
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:191) ~[minecraft.jar:?]
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:146) ~[minecraft.jar:?]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93) ~[minecraft.jar:?]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172) ~[minecraft.jar:?]
    at com.google.gson.Gson.fromJson(Gson.java:795) ~[minecraft.jar:?]
    at com.google.gson.Gson.fromJson(Gson.java:761) ~[minecraft.jar:?]
    at com.google.gson.Gson.fromJson(Gson.java:710) ~[minecraft.jar:?]
    at com.google.gson.Gson.fromJson(Gson.java:682) ~[minecraft.jar:?]
    at net.minecraft.launcher.updater.LocalVersionList.refreshVersions(LocalVersionList.java:46) [launcher.jar:1.6.89-j]
    at net.minecraft.launcher.updater.MinecraftVersionManager.refreshVersions(MinecraftVersionManager.java:60) [launcher.jar:1.6.89-j]
    at net.minecraft.launcher.Launcher$2.run(Launcher.java:177) [launcher.jar:1.6.89-j]
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514) [?:?]
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135) [?:?]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
    at java.base/java.lang.Thread.run(Thread.java:844) [?:?]
[11:48:41 INFO]: Refreshing remote version list...
[11:48:42 INFO]: Refresh complete.
[11:48:42 INFO]: Installed CompleteVersion{id='1.8.8', updatedTime=Mon Jul 27 12:31:28 CEST 2015, releasedTime=Mon Jul 27 12:31:28 CEST 2015, type=RELEASE, libraries=[Library{name='com.mojang:netty:1.6', rules=null, natives=null, extract=null}, Library{name='oshi-project:oshi-core:1.1', rules=null, natives=null, extract=null}, Library{name='net.java.dev.jna:jna:3.4.0', rules=null, natives=null, extract=null}, Library{name='net.java.dev.jna:platform:3.4.0', rules=null, natives=null, extract=null}, Library{name='com.ibm.icu:icu4j-core-mojang:51.2', rules=null, natives=null, extract=null}, Library{name='net.sf.jopt-simple:jopt-simple:4.6', rules=null, natives=null, extract=null}, Library{name='com.paulscode:codecjorbis:20101023', rules=null, natives=null, extract=null}, Library{name='com.paulscode:codecwav:20101023', rules=null, natives=null, extract=null}, Library{name='com.paulscode:libraryjavasound:20101123', rules=null, natives=null, extract=null}, Library{name='com.paulscode:librarylwjglopenal:20100824', rules=null, natives=null, extract=null}, Library{name='com.paulscode:soundsystem:20120107', rules=null, natives=null, extract=null}, Library{name='io.netty:netty-all:4.0.23.Final', rules=null, natives=null, extract=null}, Library{name='com.google.guava:guava:17.0', rules=null, natives=null, extract=null}, Library{name='org.apache.commons:commons-lang3:3.3.2', rules=null, natives=null, extract=null}, Library{name='commons-io:commons-io:2.4', rules=null, natives=null, extract=null}, Library{name='commons-codec:commons-codec:1.9', rules=null, natives=null, extract=null}, Library{name='net.java.jinput:jinput:2.0.5', rules=null, natives=null, extract=null}, Library{name='net.java.jutils:jutils:1.0.0', rules=null, natives=null, extract=null}, Library{name='com.google.code.gson:gson:2.2.4', rules=null, natives=null, extract=null}, Library{name='com.mojang:authlib:1.5.21', rules=null, natives=null, extract=null}, Library{name='com.mojang:realms:1.7.39', rules=null, natives=null, extract=null}, Library{name='org.apache.commons:commons-compress:1.8.1', rules=null, natives=null, extract=null}, Library{name='org.apache.httpcomponents:httpclient:4.3.3', rules=null, natives=null, extract=null}, Library{name='commons-logging:commons-logging:1.1.3', rules=null, natives=null, extract=null}, Library{name='org.apache.httpcomponents:httpcore:4.3.2', rules=null, natives=null, extract=null}, Library{name='org.apache.logging.log4j:log4j-api:2.0-beta9', rules=null, natives=null, extract=null}, Library{name='org.apache.logging.log4j:log4j-core:2.0-beta9', rules=null, natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl:2.9.4-nightly-20150209', rules=[Rule{action=ALLOW, os=null, features=null}, Rule{action=DISALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl_util:2.9.4-nightly-20150209', rules=[Rule{action=ALLOW, os=null, features=null}, Rule{action=DISALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl-platform:2.9.4-nightly-20150209', rules=[Rule{action=ALLOW, os=null, features=null}, Rule{action=DISALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives={LINUX=natives-linux, OSX=natives-osx, WINDOWS=natives-windows}, extract=com.mojang.launcher.versions.ExtractRules@e0c1a16}, Library{name='org.lwjgl.lwjgl:lwjgl:2.9.2-nightly-20140822', rules=[Rule{action=ALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl_util:2.9.2-nightly-20140822', rules=[Rule{action=ALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl-platform:2.9.2-nightly-20140822', rules=[Rule{action=ALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives={LINUX=natives-linux, OSX=natives-osx, WINDOWS=natives-windows}, extract=com.mojang.launcher.versions.ExtractRules@703e8b74}, Library{name='net.java.jinput:jinput-platform:2.0.5', rules=null, natives={LINUX=natives-linux, OSX=natives-osx, WINDOWS=natives-windows}, extract=com.mojang.launcher.versions.ExtractRules@30bebebe}, Library{name='tv.twitch:twitch:6.5', rules=null, natives=null, extract=null}, Library{name='tv.twitch:twitch-platform:6.5', rules=[Rule{action=ALLOW, os=null, features=null}, Rule{action=DISALLOW, os=OSRestriction{name=LINUX, version='null', arch='null'}, features=null}], natives={LINUX=natives-linux, OSX=natives-osx, WINDOWS=natives-windows-${arch}}, extract=com.mojang.launcher.versions.ExtractRules@68e55e0d}, Library{name='tv.twitch:twitch-external-platform:4.5', rules=[Rule{action=ALLOW, os=OSRestriction{name=WINDOWS, version='null', arch='null'}, features=null}], natives={WINDOWS=natives-windows-${arch}}, extract=com.mojang.launcher.versions.ExtractRules@65735ad}], mainClass='net.minecraft.client.main.Main', jar='null', minimumLauncherVersion=14}
[11:48:42 INFO]: Loaded 1 profile(s); selected 'goodjonx'
[11:48:42 INFO]: Refreshing auth...
[11:48:42 INFO]: Logging in with access token
[11:48:42 INFO]: Installed CompleteVersion{id='1.8.8', updatedTime=Mon Jul 27 12:31:28 CEST 2015, releasedTime=Mon Jul 27 12:31:28 CEST 2015, type=RELEASE, libraries=[Library{name='com.mojang:netty:1.6', rules=null, natives=null, extract=null}, Library{name='oshi-project:oshi-core:1.1', rules=null, natives=null, extract=null}, Library{name='net.java.dev.jna:jna:3.4.0', rules=null, natives=null, extract=null}, Library{name='net.java.dev.jna:platform:3.4.0', rules=null, natives=null, extract=null}, Library{name='com.ibm.icu:icu4j-core-mojang:51.2', rules=null, natives=null, extract=null}, Library{name='net.sf.jopt-simple:jopt-simple:4.6', rules=null, natives=null, extract=null}, Library{name='com.paulscode:codecjorbis:20101023', rules=null, natives=null, extract=null}, Library{name='com.paulscode:codecwav:20101023', rules=null, natives=null, extract=null}, Library{name='com.paulscode:libraryjavasound:20101123', rules=null, natives=null, extract=null}, Library{name='com.paulscode:librarylwjglopenal:20100824', rules=null, natives=null, extract=null}, Library{name='com.paulscode:soundsystem:20120107', rules=null, natives=null, extract=null}, Library{name='io.netty:netty-all:4.0.23.Final', rules=null, natives=null, extract=null}, Library{name='com.google.guava:guava:17.0', rules=null, natives=null, extract=null}, Library{name='org.apache.commons:commons-lang3:3.3.2', rules=null, natives=null, extract=null}, Library{name='commons-io:commons-io:2.4', rules=null, natives=null, extract=null}, Library{name='commons-codec:commons-codec:1.9', rules=null, natives=null, extract=null}, Library{name='net.java.jinput:jinput:2.0.5', rules=null, natives=null, extract=null}, Library{name='net.java.jutils:jutils:1.0.0', rules=null, natives=null, extract=null}, Library{name='com.google.code.gson:gson:2.2.4', rules=null, natives=null, extract=null}, Library{name='com.mojang:authlib:1.5.21', rules=null, natives=null, extract=null}, Library{name='com.mojang:realms:1.7.39', rules=null, natives=null, extract=null}, Library{name='org.apache.commons:commons-compress:1.8.1', rules=null, natives=null, extract=null}, Library{name='org.apache.httpcomponents:httpclient:4.3.3', rules=null, natives=null, extract=null}, Library{name='commons-logging:commons-logging:1.1.3', rules=null, natives=null, extract=null}, Library{name='org.apache.httpcomponents:httpcore:4.3.2', rules=null, natives=null, extract=null}, Library{name='org.apache.logging.log4j:log4j-api:2.0-beta9', rules=null, natives=null, extract=null}, Library{name='org.apache.logging.log4j:log4j-core:2.0-beta9', rules=null, natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl:2.9.4-nightly-20150209', rules=[Rule{action=ALLOW, os=null, features=null}, Rule{action=DISALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl_util:2.9.4-nightly-20150209', rules=[Rule{action=ALLOW, os=null, features=null}, Rule{action=DISALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl-platform:2.9.4-nightly-20150209', rules=[Rule{action=ALLOW, os=null, features=null}, Rule{action=DISALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives={LINUX=natives-linux, OSX=natives-osx, WINDOWS=natives-windows}, extract=com.mojang.launcher.versions.ExtractRules@574334db}, Library{name='org.lwjgl.lwjgl:lwjgl:2.9.2-nightly-20140822', rules=[Rule{action=ALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl_util:2.9.2-nightly-20140822', rules=[Rule{action=ALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives=null, extract=null}, Library{name='org.lwjgl.lwjgl:lwjgl-platform:2.9.2-nightly-20140822', rules=[Rule{action=ALLOW, os=OSRestriction{name=OSX, version='null', arch='null'}, features=null}], natives={LINUX=natives-linux, OSX=natives-osx, WINDOWS=natives-windows}, extract=com.mojang.launcher.versions.ExtractRules@394a1f2}, Library{name='net.java.jinput:jinput-platform:2.0.5', rules=null, natives={LINUX=natives-linux, OSX=natives-osx, WINDOWS=natives-windows}, extract=com.mojang.launcher.versions.ExtractRules@24f51c9d}, Library{name='tv.twitch:twitch:6.5', rules=null, natives=null, extract=null}, Library{name='tv.twitch:twitch-platform:6.5', rules=[Rule{action=ALLOW, os=null, features=null}, Rule{action=DISALLOW, os=OSRestriction{name=LINUX, version='null', arch='null'}, features=null}], natives={LINUX=natives-linux, OSX=natives-osx, WINDOWS=natives-windows-${arch}}, extract=com.mojang.launcher.versions.ExtractRules@46103930}, Library{name='tv.twitch:twitch-external-platform:4.5', rules=[Rule{action=ALLOW, os=OSRestriction{name=WINDOWS, version='null', arch='null'}, features=null}], natives={WINDOWS=natives-windows-${arch}}, extract=com.mojang.launcher.versions.ExtractRules@83b38c5}], mainClass='net.minecraft.client.main.Main', jar='null', minimumLauncherVersion=14}
[11:48:43 INFO]: Getting syncinfo for selected version
[11:48:43 INFO]: Queueing library & version downloads
[11:48:44 FATAL]: Unhandled exception in thread Thread[pool-2-thread-2,5,main]
com.google.gson.JsonSyntaxException: duplicate key: null
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:191) ~[minecraft.jar:?]
    at com.google.gson.internal.bind.MapTypeAdapterFactory$Adapter.read(MapTypeAdapterFactory.java:146) ~[minecraft.jar:?]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93) ~[minecraft.jar:?]
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172) ~[minecraft.jar:?]
    at com.google.gson.Gson.fromJson(Gson.java:795) ~[minecraft.jar:?]
    at com.google.gson.Gson.fromJson(Gson.java:761) ~[minecraft.jar:?]
    at com.google.gson.Gson.fromJson(Gson.java:710) ~[minecraft.jar:?]
    at com.google.gson.Gson.fromJson(Gson.java:682) ~[minecraft.jar:?]
    at net.minecraft.launcher.updater.RemoteVersionList.getCompleteVersion(RemoteVersionList.java:32) ~[launcher.jar:1.6.89-j]
    at net.minecraft.launcher.updater.MinecraftVersionManager.getLatestCompleteVersion(MinecraftVersionManager.java:213) ~[launcher.jar:1.6.89-j]
    at net.minecraft.launcher.updater.MinecraftVersionManager.getLatestCompleteVersion(MinecraftVersionManager.java:37) ~[launcher.jar:1.6.89-j]
    at com.mojang.launcher.game.runner.AbstractGameRunner.playGame(AbstractGameRunner.java:67) ~[launcher.jar:1.6.89-j]
    at net.minecraft.launcher.game.GameLaunchDispatcher$1.run(GameLaunchDispatcher.java:111) ~[launcher.jar:1.6.89-j]
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1135) ~[?:?]
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[?:?]
    at java.base/java.lang.Thread.run(Thread.java:844) [?:?]

 

[DaemonUmbra]

What Launcher are you using?

Please provide a screenshot