Nextcloud snap not reachable (no php-fpm processes)


I’ve been running a Nextcloud-snap on a Raspberry Pi with external hard drive for over a year now.
Last week however, I had an issue with some permissions. After some tinkering I got it working again. The day after that, I noticed the site wasn’t reachable. I didn’t see an error message, so I figured I should just restart the server and it would work again, which it did. It’s been doing that for a few days now.
I turned the server off 2 days ago and I wanted to login now, but the dashboard won’t appear, it just keeps loading after I’ve typed in my credentials.
There aren’t any php-fpm processes visible in htop, so my guess is that the issue’s with that.