I wonder if anyone can help please?

I have created a Zap to find an event in my Team Up Calendar - which works fine.

It then looks to find a value from an Excel Sheet based on matching a contact name from the Team Up Event - which works fine.

It then attempts to update the Team Up Event with a value from the Excel Sheet. 

I believe it must be finding the event to update, however I get the following error in Zapier which prevents me from creating the Zap successfully.  I cannot therefore update the TeamUp Event.

I have recreated multiple access keys i.e. for the TeamUp Calendar, have checked permissions behind those access keys.  Have also created the connection from Zapier to my Team Up calendar multiple times.  Still no joy…  About to give up lol after a few days of trying to do something which feels simple in concept.

Please restore my faith lol :-)

I wonder if you can help me please?