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New Member

Error: Unsupported SerializedParameterInfo

We are connecting our Flow to a Sharepoint list. This list is connected to a MS Outlook mailbox. We are trying to build a trigger to show "sent" emails coming from an email chain (We are able to identify one email chain by the 'Conversation ID' and use the Conversation ID to update the Sharepoint list).


This error message reads: "Unsupported SerializedParameterInfo 'in' value: ". 


What does this mean? And how do we get rid of it? We want to be able to save our trigger. 

New Member

I got the same error message and created an ICM ticket. Will update once I get any response.

Sounds good, thank you!

New Member

@morganharis / @alexq 


I just ran into the same issue while trying to create and automated flow. After some trial and error I discovered this issue only occurs when you define a flow trigger through the Build an automated flow wizard. If you simply click Skip then manually define your flow name and trigger in the editor view you can save without issue. I confirmed this with an identical flow of email arrived v3 trigger to post a message on teams v3 action that failed to save when I selected the trigger through the wizard. I confirmed this in both Edge and Chrome/Brave.


Hopefully this saves the next person some head scratching time!!!

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