I'll try again but I'm not sure how to fix it, I'm using infinite time and no limit on the invite
Yeah, it’s still not working. No clue why, since you seem to be doing everything right.
try opening the link in your browser's incogneto/inprivate mode
for some reason that fixes the problem for me when it happens with other invites
The link is case sensitive. I notice the link here is all caps, which while possible, is statistically unlikely. Make sure you're putting the link in with the same capitalization as shown in discord.
The posted link is the one I use from the tfgs site