VSTS - Azure end point issue

I am currently getting the following error on VSTS when trying to do publish a release to a Azure:

The release definition cannot be saved because the environment 'App-Service-Template' references a service endpoint that is in dirty state. Update the endpoint(s) and retry the operation. Details: 'System.Collections.Generic.List`1[System.String]'

I have tried the following troubleshooting steps and still get the same error:

• I have recreated the service end point in VSTS and it fails
• I have recreated the Resource group in Azure that the service point connects to and have tried to connect the end point to a empty resource group and it fails
• I followed the manual steps of creating the end point connection, i then can verify the status of the connection which passes. I then try to publish the release to Azure and get the above error message.
• Lastly i have tried all the MS VSTS recommended troubleshooting with still no luck https://learn.microsoft.com/en-us/vsts/pipelines/release/azure-rm-endpoint?view=vsts

I am all out of ideas. Any Help would be appreciated.

Cheers

What ultimately fixed this issue for us was abandoning and deleting the failed releases, and then a new build and release triggered from that new build.

(one weird quirk we encountered was that the release sat in the last stage for over 8 minutes: 'wait for console output from agent'... when I left the release and came back it said successful with the last stage only taking 27 seconds)

We had the exact same error. I also ran through the points on your list with no luck, before arriving at the solution with a new build and release.