Why are we getting these errors on the 'Run Convert Pending Workers Automatically' Job?

We have the convert pending workers job run nightly and we get these errors below. We can't find a specific reason why some of the users fail vs the ones that pass. These are our contingent/MSP workers. I am seeing that there is an action on the pending worker record of 'Add Pending Worker' so not sure why this is failing.

Cause for failure : The ActionId attribute value is required. You must enter a value.