Fatal error: class-snoopy.php

Fatal error: Allowed memory size of 6291456 bytes exhausted (tried to allocate 77824 bytes) in /web/www/frac/users/h/hollowell/blogg/william/wp-includes/class-snoopy.php on line 871

Comes up when i try to go to my blog on my new domain even if i did everithing like it said on support….