Peter after I got the 403 error there was a myphpadmin upgrade which once complete changed the error to

I've since done a complete clean reinstall and only added web mail ftp and database and i still get the same error, unfortunatlly i don't know where the logs are to look. Mariadb now shows up as installed in the marketplace and everything else seems to be working but until I get maria working I cant set up a test website and check at least internally