My partner plays on PS5 and is having trouble playing FFXIV today (everything worked fine at 6.4 launch), the PS5 isn't going past the launcher, which isn't loading - he doesn't get any error popups or anything.

We've tried googling a bunch but can't see anyone with this issue since 2021 (when the issue was caused by server equipment) - we would welcome any suggestions! He hasn't tried reinstalling yet as this will take several hours (but will be a last resort in case it is necessary).