This morning I woke up to the following error in Enterprise Portal:
We tried 'IISRESTART' and full restarts of our EP and AX servers.
I then looked at the web.config file and found that it had been modified last night. I also found the some Sharepoint security updates had come through as well. I knew the web.config was the issue but had no way of knowing what it was.
After posting on the AX forum, a great user gave me the solution.
https://community.dynamics.com/ax/f/microsoft-dynamics-ax-forum/404119/ep-the-referenced-file-is-not-allowed-on-this-page/1098599#1098599
In the <SafeMode><PageParserPaths> HERE </PageParserPaths></SafeMode> you need to put:
<PageParserPath VirtualPath="/*" CompilationMode="Always" AllowServerSideScript="true" AllowUnsafeControls="true" IncludeSubFolders="true"></PageParserPath>
Once I put that in there, it worked perfectly! No need to uninstall the updates.
