Simple Press not showing on website

Hello,

I was working on my site and accidently upgraded the forum from 4.2 to 5.3.4. This is an older site and I noticed the forum was not working anymore, so I clicked on the upgrade, which it says went fine. I can see all the groups and forums in the backend of word press, but doesn’t show anything on the front end “the actual website” How can I fix this.

Here is the website: https://paulasbeautyshop.com/forum-2/

Thanks again