[kh99]

Originally Posted by ForceHSS

Looks like its being caused by a custom plugin. Disable all plugins then turn one on at a time to see what one is causing the problem

That's probably a good idea. That error is obviously coming from the blog product, but looking at the blog code I see now that the file blog_functions_online.php should be included in one of the other blog plugins (and it uses "require", so most likely the file is not missing). So it could be that you have some plugins missing or disabled, but I think it also could be that another plugin on the same hook (init_startup) is causing the problem (which you might be able to determine by disabling them as mention above).