4
Hi Ed,
You may need to try a complete install of Xoops. If you can get to cpanel and copy the site to your PC (database and XOOPS Modules, etc.) that's the way to start.
Once you have everything copied to your PC test the site locally first (if you can). See if you get the same problem there. If you do, then upload the current release of XOOPS and reinstall.
I know it's a bit of work, but the results should ensure you are able to access your site.