When Delegates are set, Performance Document Approval Transactions are failing

Summary:

Content (required):

Hello, we've recently found that when our managers are setting delegations, Performance Document Approval transactions are failing. Neither the regular manager nor the delegate receives the task to approve the Performance Document. While the Document seems to move to an Approval step (as shown on the My Client Groups>Performance>Performance Documents page, when searching for the document) , the document itself still shows "We are submitting your changes for approval."

Has anyone else come across this? It's odd that the transaction fails completely. See attached error.

Thank you in advance!

Version (include the version you are using, if applicable):