I had this same problem.
There are 2 things I have found that worked, one for me, and the other for everyone else:
Here is the common fix:
- Go to your admin panel.
- Select: Settings > Advanced Settings > Templates
- De-select all cache checkboxes. *Leave "Enable cache for HTML files" checked. Then save.
- Select: Modules > Orca Forum
- Then recompile your language file from there.
- Finally, refresh your browser.
*This has worked for several people, but not me.
What worked for me was this:
- Uninstall "Events" and "Groups" via Admin Panel >> Tools > Module
- Afterward, uninstall "Forums" the same way.
- Download the latest Dolphin 7 from Boonex (Even if you have it, get a fresh copy) and extract the .zip drive on your computer.
- Via your webhost control panel or FTP, delete ONLY the "forum" folder (www.mysite.com/modules/boonex/forum)
- Upload the fresh copy of the "forum" folder from the new Dolphin download to the same place you deleted it from.
- Visit Admin panel >> Tools > Modules and reinstall "Orca Forum"
- Then reinstall "Events" and "Groups" afterward.
- Click "Admin Home" at the top of your admin panel and Clear all cache
- Click Modules > Orca Forums and recompile your language, then refresh your browser.
** That's how I got mine to work.
Hope this helps.