Getting a 502 Bad Gateway Error When Accessing Element Web

Issue 
 
 We are getting a 502 Bad Gateway Error from nginx when accessing Element Web. 
 
 Environment 
 
 Element Enterprise Installer 1.0.0 
 Red Hat Enterprise Linux 8.5 
 
 Resolution 
 
 Allow access to ports 80 and 443 and enable masquerading in the firewall: 
 
 sudo firewall-cmd --add-service={http,https} --permanent
sudo firewall-cmd --add-masquerade --permanent
sudo firewall-cmd --reload
 
 Root Cause 
 By default, firewalld does not allow masquerading (Network Address Translation, NAT) through the firewall. This causes all sorts of trouble with doing the NAT required to access pods in microk8s.