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Hi Võ Ngọc Tân
Thank you for posting your question on the Microsoft Q&A forum.
To better understand the issue, could you please clarify the following?
- Are you using Power Automate Approvals or a custom Actionable Message with an Adaptive Card?
- At which step of creating the Actionable Message does the error occur?
- Could you let me know which API or method you are using to create the Actionable Message, and which Microsoft article or documentation you are following?
- Could you share a screenshot of the complete error message? If so, you can send the screenshot via private message to avoid exposing any personal or organizational information publicly.
Please understand that our initial reply may not always immediately resolve the issue. However, with your help and more detailed information, we can work together to find a solution.
I look forward to your update.
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