Am not an Azure person ... just sharing back info poster sent to me via PM but with sensitive info redacted ... maybe someone who is an Azure person and runs the plugin will see this and assist Michael ..
I'll be darn ... the FQDN of the site resolves to a Microsoft IP address.
Clicking login I get the following error screen:
Oops.
The site at http://IPADDRESS/local/edwiserform/form.php?id=3 has experienced a network protocol violation that cannot be repaired.
The page you are trying to view cannot be shown because an error in the data transmission was detected.
Please contact the website owners to inform them of this problem.
That is not a moodle error screen and you can see it does say "network protocol violation". And it's flipping from https:// (secure) to http:// (*** NOT SECURE ***) and for passing login credentials?!!!!!! Wow! No offense, but looks like a site that prime for hacking!
My best advise ... contact the makers of the plugin and share this info with them. Am pretty sure no one at Mircrosoft will give free technical assistance .. epecially with open sourced Moodle PHP code.
I did check out the plugin makers page and it shows a version for 4.0 but no mention of any higher version ... and there is no info for public viewing on their FAQ's, docs, etc. of any help.
Begin virtual finger wag ..
One of the things a Moodle admin must do *before* upgrading core moodle is to check addons to assure there is a compatible version for the destination core version of Moodle. Don't think you did that.
-- end virtual finger wag ..
Comment: Are you sure you are not running Ubuntu as the guest OS under Azure and the Moodle, even though Bitnami, does have command line shell access?
Anyway, the only way you can get technical assistenace now, I think, is to copy the DEBUG lines from config-dist.php to your active config.php file so one can see if your moodle code is complaining about something .... AND/OR ... more than likely, your operating systems error logs for a clue cause that screen is NOT a moodle error screen.
'SoS', Ken