Forge version 31.2.33, download on this site, install on vanilla 1.15.2, after that try launch game from my custom launch and get crash with this log^
[03авг2020 20:54:40.370] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--width, 900, --height, 532, --server, 82.202.249.78, --port, 25575, --accessToken, ????????, --uuid, 5d6dd94ab2ab3030aaac665d39d079d9, --assetIndex, 1.15.2, --userType, mojang, --versionType, modified, --username, Sanysvo, --version, 1.15.2, --gameDir, C:\barscraft\barscraft1.15.2, --assetsDir, C:\barscraft\assets, --launchTarget, fmlclient, --fml.forgeVersion, 31.2.33, --fml.mcVersion, 1.15.2, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20200515.085601]
[03авг2020 20:54:40.374] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 5.1.2+70+master.2845bb9 starting: java version 1.8.0_221 by Oracle Corporation
[03авг2020 20:54:40.837] [main/INFO] [net.minecraftforge.fml.loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[03авг2020 20:54:41.991] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlclient' with arguments [--version, 1.15.2, --gameDir, C:\barscraft\barscraft1.15.2, --assetsDir, C:\barscraft\assets, --uuid, 5d6dd94ab2ab3030aaac665d39d079d9, --width, 900, --height, 532, --server, 82.202.249.78, --port, 25575, --accessToken, ????????, --assetIndex, 1.15.2, --userType, mojang, --versionType, modified, --username, Sanysvo]
[03авг2020 20:54:42.013] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.RuntimeException: java.lang.IllegalArgumentException
[03авг2020 20:54:42.014] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:39)
[03авг2020 20:54:42.014] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54)
[03авг2020 20:54:42.014] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72)
[03авг2020 20:54:42.014] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.run(Launcher.java:81)
[03авг2020 20:54:42.014] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)
[03авг2020 20:54:42.014] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: java.lang.IllegalArgumentException
[03авг2020 20:54:42.014] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at org.objectweb.asm.ClassVisitor.<init>(ClassVisitor.java:69)
[03авг2020 20:54:42.015] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at org.objectweb.asm.ClassVisitor.<init>(ClassVisitor.java:56)
[03авг2020 20:54:42.015] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at org.objectweb.asm.tree.ClassNode.<init>(ClassNode.java:150)
[03авг2020 20:54:42.015] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:69)
[03авг2020 20:54:42.015] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:247)
[03авг2020 20:54:42.015] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:134)
[03авг2020 20:54:42.015] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:96)
[03авг2020 20:54:42.015] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
[03авг2020 20:54:42.015] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.Class.forName0(Native Method)
[03авг2020 20:54:42.016] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.Class.forName(Class.java:348)
[03авг2020 20:54:42.016] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51)
[03авг2020 20:54:42.016] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
[03авг2020 20:54:42.016] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: ... 4 more
I cant understand that is the wrong argument on the launch...