Flow Approval Error: The remote endpoint returned an error (HTTP UnsupportedMediaType). Please try again later.

[bogeorgethreewi]

I'm getting the above error in a Flow with the Approval Start and wait for Approval shape.  I create a simple flow that waits for a SharePoint list item to be created or change and then just the Approval Start and wait for Approval action.

In Outlook (web browser), when I click Approve or Reject I get "The remote endpoint returned an error (HTTP UnsupportedMediaType). Please try again later."

It looks like the HTTP POST is going to the below URL.  Hope this helps.
https://outlook.office.com/actions/userid/messages/***token***=/executeAction?culture=en-US

[v-bacao-msft]

Hi @bogeorgethreewi ,

Thanks for your feedback.

I did a test on my side and I can reproduce such an issue.

It seems that Approval request works in Edge, and the test results in Chrome and Firefox are the same as you described.

I will report this issue on my side, if there are any updates, I will post back.

Best Regards,

[mikedev8888]

Yep also getting the same - this is the same issue reported by @Anonymous here: https://powerusers.microsoft.com/t5/I-Found-A-Bug/Approval-behaviour-has-changed-duplication-approval-request/m-p/299455#M4567

[bogeorgethreewi · Accepted solution]

I tested this again this afternoon and it appears to be fixed now.