The result must be a valid array.

[S_Tran]

I have a simple workflow to send out a daily email reminder for tasks that are due today from a Sharepoint Tasks list.  My Flow has this error:  The execution of template action 'Apply_to_each' failed: the result of the evaluation of 'foreach' expression '@items('Apply_to_each_2')' is of type 'Object'. The result must be a valid array.

Please see screenshot of my current flow job:

[mahoneypat]

The 'current item' in your inner Apply to each is an object, not an array.  You should be able to delete that and do you action inside the outer Apply to each.

Pat

[MarkFerrero]

I'm pretty sure the innter Apply to each is there becuase it's a multivalue person column.