if i start minecraft the game crasht ;(

Not enough information to help ya :/

do this help?

14:11:38.547
[java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.loading.FMLLoader.setupLaunchHandler(FMLLoader.java:195)
14:11:38.547
[java.lang.ThreadGroup:uncaughtException:1052]: at net.minecraftforge.fml.loading.FMLServiceProvider.initialize(FMLServiceProvider.java:92)
14:11:38.547
[java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServiceDecorator.onInitialize(TransformationServiceDecorator.java:68)
14:11:38.547
[java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler.lambda$initialiseTransformationServices$7(TransformationServicesHandler.java:107)
14:11:38.547
[java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler$$Lambda$84/1108924067.accept(Unknown Source)
14:11:38.548
[java.lang.ThreadGroup:uncaughtException:1052]: at java.util.HashMap$Values.forEach(HashMap.java:972)
14:11:38.548
[java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler.initialiseTransformationServices(TransformationServicesHandler.java:107)
14:11:38.548
[java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.TransformationServicesHandler.initializeTransformationServices(TransformationServicesHandler.java:59)
14:11:38.548
[java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.run(Launcher.java:75)
14:11:38.555
[java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.main(Launcher.java:65)
14:11:38.935

Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=256m; support was removed in 8.0
14:11:38.935
Process crashed with exit code 1

no, it's not :/
send crash-report as file or as pastebin link (NOT THE SCREENSHOT OR IT'S CONTENTS). By default, crash-report can be found in C:/Users/[username]/AppData/Roaming/.minecraft/crash-report on Windows and /home/[username]/.minecraft/crash-reports on Linux

oh, and what is your launcher?

2020-04-13-2.log

it could not find C:\Users\Max Baumgarten\Twitch\Minecraft\Install\libraries\net\minecraftforge\forge\1.14.4-28.2.3\forge-1.14.4-28.2.3-client.jar, try downloading and installing forge manually

ok