In reply to oh_ok_simp:
I believe I found a fix is you are still having the issue just go to into file explorer
This PC > Local Disk > User > (whatever your user name is) > Documents
then find twitch and delete the whole folder or at least the minecraft folder inside it then open curse and have it make another one.
Don't forget to run minecraft first before trying to download something as it may need to update its own files.