by Ken Task.
Please see:
https://moodle.org/mod/forum/discuss.php?d=163443
The error you see has to do with your account being pointed to a PHP version lower than what is required ... gathered from discussion above.
Don't host with 1and1 so can't tell you for certain, but folks in the discussion above reported success .... well, with earlier versions of 2, at least.
'spirit of sharing', Ken