Cant open any modpacks

[Gamerdude0505]

when i open a modpack it just closes the launcher and re opens i dont know the problem ive tryed installing different javas and increasing the memory nothing works it just gives me this code in the console Failed to load class "org.slf4j.impl.StaticLoggerBinder".
[B#347] SLF4J: Defaulting to no-operation (NOP) logger implementation
[B#347] SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[B#347] File version.json not found in C: please help

[JaariAtmc]

4 hours ago, Gamerdude0505 said:

when i open a modpack it just closes the launcher and re opens i dont know the problem ive tryed installing different javas and increasing the memory nothing works it just gives me this code in the console Failed to load class "org.slf4j.impl.StaticLoggerBinder".
[B#347] SLF4J: Defaulting to no-operation (NOP) logger implementation
[B#347] SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
[B#347] File version.json not found in C: please help

Ah, you were on Discord before, I assume? Your name is familiar. Your issue is a java environment variable that limits your java usage to 512 MB. You can remove it using this file:

http://tk.iamtrue.net/clearJavaEnvVars.bat

Just run it (nothing will come up, no confirmation either), then restart your launcher and try again.