[runClient task crashes]

New into MC modding, downloaded latest MDK, latesk JDK, unzipped it, import an project from existing source into intelliJ IDEA, run every task might help (such as genIntellijRuns, prepareRun, buildEnvironment) before runClient just to test an empty mod. So i'm getting...

Execution failed for task ':runClient'.
> Process 'command 'C:\Program Files\Java\jdk-14.0.1\bin\java.exe'' finished with non-zero exit value -1

a little stacktrace from task:

[14:55:26] [Render thread/INFO] [minecraft/Minecraft]: Backend library: LWJGL version 3.2.2 build 10
[14:55:26] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:103]: ---- Minecraft Crash Report ----
// You're mean.

Time: 4/29/20, 2:55 PM
Description: Initializing game

java.lang.IllegalStateException: Could not load icon: Image not of any known type, or corrupt
	at net.minecraft.client.MainWindow.setWindowIcon(MainWindow.java:154) ~[forge-1.15.2-31.1.9_mapped_stable_60-1.15-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.client.Minecraft.<init>(Minecraft.java:380) ~[forge-1.15.2-31.1.9_mapped_stable_60-1.15-recomp.jar:?] {re:classloading,pl:accesstransformer:B,pl:runtimedistcleaner:A}
	at net.minecraft.client.main.Main.main(Main.java:141) ~[forge-1.15.2-31.1.9_mapped_stable_60-1.15-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?] {}
	at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:?] {}
	at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?] {}
	at java.lang.reflect.Method.invoke(Method.java:564) ~[?:?] {}
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:55) ~[forge-1.15.2-31.1.9_mapped_stable_60-1.15-recomp.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37) [modlauncher-5.0.0.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54) [modlauncher-5.0.0.jar:?] {}
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72) [modlauncher-5.0.0.jar:?] {}
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:81) [modlauncher-5.0.0.jar:?] {}
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:65) [modlauncher-5.0.0.jar:?] {}
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:102) [forge-1.15.2-31.1.9_mapped_stable_60-1.15-recomp.jar:?] {}


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Render thread
Stacktrace:
	at net.minecraft.client.MainWindow.setWindowIcon(MainWindow.java:154)
	at net.minecraft.client.Minecraft.<init>(Minecraft.java:380)

-- Initialization --
Details:
Stacktrace:
	at net.minecraft.client.main.Main.main(Main.java:141)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
	at net.minecraftforge.userdev.FMLUserdevClientLaunchProvider.lambda$launchService$0(FMLUserdevClientLaunchProvider.java:55)
	at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54)
	at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72)
	at cpw.mods.modlauncher.Launcher.run(Launcher.java:81)
	at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)
	at net.minecraftforge.userdev.LaunchTesting.main(LaunchTesting.java:102)

-- System Details --
Details:
	Minecraft Version: 1.15.2
	Minecraft Version ID: 1.15.2
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 14.0.1, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode, sharing), Oracle Corporation
	Memory: 986858880 bytes (941 MB) / 1692401664 bytes (1614 MB) up to 4257218560 bytes (4060 MB)
	CPUs: 8
	JVM Flags: 1 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump
	Launched Version: MOD_DEV
	Backend library: LWJGL version 3.2.2 build 10
	Backend API: Intel(R) UHD Graphics 630 GL version 4.6.0 - Build 26.20.100.7262, Intel
	GL Caps: 
	Using VBOs: Yes
	Is Modded: Definitely; Client brand changed to 'forge'
	Type: Client (map_client.txt)
	CPU: <unknown>
[14:55:26] [Render thread/INFO] [STDOUT/]: [net.minecraft.util.registry.Bootstrap:printToSYSOUT:103]: #@!@# Game crashed! Crash report saved to: #@!@# D:\MinecraftDevelopment\test7\run\.\crash-reports\crash-2020-04-29_14.55.26-client.txt

crashreport is attached, in short it says:

java.lang.IllegalStateException: Could not load icon: Image not of any known type, or corrupt
	at net.minecraft.client.MainWindow.setWindowIcon(MainWindow.java:154) ~[forge-1.15.2-31.1.9_mapped_stable_60-1.15-recomp.jar:?] {re:classloading,pl:runtimedistcleaner:A}

Gradle and project SDK are both set to the same JDK (14.0.1)

 

I also tried to use https://plugins.jetbrains.com/plugin/8327-minecraft-development <-- this one intelliJ extension to set up a new project for latest stable forge, and still getting the same error. p.s. Environment variables like JAVA_HOME and Path are OK.

crash-2020-04-29_14.55.26-client.txt