Thanks to millyrainbow for letting me know forums went side ways again (white page when you clicked a thread). Reached out and got them to fix it in a day's time.
I think (if it's in the forum settings) I know what they're doing to fix it when it happens. Asking them if that's what it is and I can do it (in the future) or if it's more server side (where I won't have the access to fix it).