having trouble in gmb

[shahidul islam pranto]

Your Workflow URL

https://connect.pabbly.com/workflow/mapping/IjU3NjUwNTZjMDYzMzA0MzA1MjZiNTUzYzUxMzEi_pc

there is an error in the gmb which is the last action on the workflow

Invalid JSON payload received. Unknown name "": Root element must be a message.

 

[ArshilAhmad]

"I have added another Spreadsheet Formula to your workflow for the Event Start Day, which seems to have fixed your issue.