Request to the Bot framework failed with error on Bot that has been working

[Jonalink]

I've had a bot that's been working now since April without any major issues. It takes the responses from a form, puts them into an adaptive card, and posts them as Flow to a Teams channel. But on the 14th it stopped working in the evening and I receive this error:

Request to the Bot framework failed with error: '{"error":{"code":"BadArgument","message":"Unable to decrypt userId, it is null or agentData is null"}}'.

I can't find anything on this, and a different bot that is on the same account works, even though it's almost identical.

Anyone familiar with where this error is coming from?

[Jonalink · Accepted solution]

Looks like I found the issue. There was code in the adaptive card that was no longer allowed with whatever the recent update of Teams/Automate was.

I had this in there:

   "msteams": {

        "entities": [

            {

                "type": "mention",

                "text": "<at>@{body('Get_user_profile_(V2)')?['displayName']}</at>",

                "mentioned": {

                    "id": "@{body('Get_user_profile_(V2)')?['id']}",

                    "name": "@{body('Get_user_profile_(V2)')?['displayName']}"

                }

            }

        ]

    },

When I was tinkering with getting the @mentions to work, which is now part of the Flow. Removing that fixed my issue.