goto phpMyAdmin, select your database, in phpfox_settings table find "site_is_offline". Change the "value_actual" from "1" to ""! That should work
Change from 1 to 0
I have had something similar happen. I would do the following:
Toggle "Site is offline?" back to "YES", click "Save Changes", clear the cache, view the site (to make sure the new setting is cached).
Then toggle "Site is offline?" back to "NO", click "Save Changes" again, clear the cache again, then visit your homepage and do a hard refresh of your browser (CTRL, F5 on windows or SHIFT, COMMAND, R on mac I believe). Sometimes, a cached version of the "offline" state gets stuck and you essentially have to kickstart the cache get it going.
I hope this is all that the issue is. Best of luck!
try to delete cache folder (PF.Base/file/cache) and reload page.
That is an excellent idea Scheinwelt-Media