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