I also have this problem!
i tried downloading the mod pack through twitch, but it says
Launching the game failed!
Failed to download file, the file contents differ from what was expected.
Filename on disk: jna-4.4.0.jar
Ive tried redownloading it, deleting and redownloading forge, deleting the specific file it was having a problem with to make it redownload, but nothings seeming to work.
i just wanna play rlcraft