@Ww: To answer your previous question, yes, likely you'd have to disable parts, or all of the sh404sef... specifically the metadata writes. I think there is an option within sh404sef to turn of metadata.... but I'm not for sure.
As for your other problem... dunno. Sounds like something went wrong in the install. No other reports of this issue, so I can only guess it's something that failed in copying files or sql. Sry. Try again.
PS. Joomla version should have nothing to do with it, as it's only a VM modification.
And BanquetTables.pro is right on both regards.