Re: FormatDateTime Microsoft.VSTS.Scheduling.TargetDate from Azure Devops
Put a Compose action between the Filter array and the Select Mapped Columns. Enter an expression in Compose containing the formula in question
formatDateTime(item()?['Microsoft.VSTS.Scheduling.TargetDate'],'mm/dd/yyyy')
Question: does Microsoft.VSTS.Scheduling.TargetDate have a value?
The error message is showing it is 'Null' instead of the date string you want. Experiment with the output of your expression and use the output from the Compose action to show your results. Once you rid of the Null value, the error should go away.