you are running out of memory.
your actual error seems to be

Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 786432 bytes) in /home/c3ntin0s/public_html/wp-content/plugins/wppizza-add-ingredients/ajax/get-json.php on line 1666

i would suggest you change / add the following to your wp-config.php
define(‘WP_MEMORY_LIMIT’, ‘128M’);

40M is the default in wordpress. although – many times – this is enough, it all depends entirely on all your other plugins and theme configuration(s) as to whether this is sufficient