Hi Tom
Apologies for the first post. I meant to edit the post and add more info in and got caught up researching what happened. I found the answer below and wanted to post it here for future reference or anyone else that might run into this issue.
I’m on FOG 1.4.4 and Ubuntu 16.04 LTS w/ latest updates.
On Chrome the Hosts tab would just provide and error that it could not load.
I found in the Apache logs at /var/log/apache2/error.log that php was using too much memory since I have so many hosts.
I then went to /etc/php/7.1/apache2/php.ini and edited the Resources to increase Memory Limit to 512M.
After increasing the memory limit I was able to load the hosts page fine.