System.InvalidOperationException: IMyInterface doesn't look like a Refit interface in builds on Azure DevOps

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P.S.: use the #bug:fault sub-category if you’re hitting a specific crash/error , or the #bug:fp sub-category for rules-related behaviour


Welcome to the community!

Your version is past EOL. You should upgrade to either the latest version or the current LTS at your earliest convenience. Your upgrade path is:

8.3.1 → 8.9.7 → 9.3 (last step optional)

You may find the Upgrade Guide helpful. If you have questions about upgrading, feel free to open a new thread for that.

If your error persists after upgrade, please come back to us.


We are on Enterprise Edition Version 9.3 (build 51899) and still seeing this issue. I also see the issue on the Refit Github repo is still open. What can we do to get this resolved.

Hi @nuttytree,

Welcome to the community!

Please create a new thread with full details of the problem. There’s not enough here (in either post, actually) for me to understand what the issue is.