So I tried inviting Supertedooo to my tribe but apparently they're getting an error that says this.

[33] Expired request.

that's all I know, never had this issue before the event though

Tell him to try to accept the invitation from another game (fort, nekodancer, etc)

it worked!

thanks, still though that's a strange bug, glad there's a fix to it

This has been an issue since the community platform's existence, so not "strange" strange but.