Fatal Error: Memory - Please help!

I have this error I searched the forum and cannot figure out how to correct it.

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 7680 bytes) in /data/25/3/65/153/3065968/user/3416100/htdocs/wordpress1/wp-content/themes/churchope/classes/Admin/Theme/Element/File.php on line 82