I still have no resolution to this. I have not yet tried to rule out potential plugins or themes but now whenever I try to access the admin dashboard I get the max execution error along with these errors now:
Fatal error: Maximum execution time of 180 seconds exceeded in /home/main/public_html/wp-includes/wp-db.php on line 2416
Warning: array_key_exists() expects parameter 2 to be array, null given in /home/main/public_html/wp-includes/cache.php on line 725
Warning: array_key_exists() expects parameter 2 to be array, null given in /home/main/public_html/wp-includes/cache.php on line 725
Warning: array_key_exists() expects parameter 2 to be array, boolean given in /home/main/public_html/wp-includes/cache.php on line 725
Warning: array_key_exists() expects parameter 2 to be array, string given in /home/main/public_html/wp-includes/cache.php on line 725
Warning: array_key_exists() expects parameter 2 to be array, boolean given in /home/main/public_html/wp-includes/cache.php on line 725
Warning: array_key_exists() expects parameter 2 to be array, integer given in /home/main/public_html/wp-includes/cache.php on line 725
Warning: array_key_exists() expects parameter 2 to be array, integer given in /home/main/public_html/wp-includes/cache.php on line 725
Warning: array_key_exists() expects parameter 2 to be array, string given in /home/main/public_html/wp-includes/cache.php on line 725
Warning: array_key_exists() expects parameter 2 to be array, boolean given in /home/main/public_html/wp-includes/cache.php on line 725
Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 654128043 bytes) in /home/main/public_html/wp-includes/cache.php on line 546