Akeeba Admin Tools does a great job securing our client's joomla websites. Komento is our current go-to commenting extension since it integrates with Joomla articles and K2 items.
However, we have found that Akeeba Admin Tools is doing too good of a job and actually preventing Komento's "AJAX" calls when a post is being made.
The resolution is to set the following to "No":
Joomla backend / Components / Admin Tools / Web Application Firewall / Configure WAF / Active Request Filtering / Direct File Inclusion shield (DFIShield)