I have a simple list with one field I named ‘Recipient’. It is a name field that allows you to select other sharepoint users. The workflow has one action, send email that does a workflow lookup at the Recipient filed on the current item and returns the field as a semicolon delimited email address. When I create a new item and select myself as the recipient the email gets sent but if I select anyone else the workflow goes into suspend status with the following status:
WOW…that’s some odd workflow issues. You gotta love SharePoint.
Okay so can you try running the email stage with elevated permissions? Something is faulting or not running the way it should it and its sticking on the email to other users.
Another thing you can do is create a new field in your list. Use an existing site column and use the Assigned To field. This is a preset people picker field that should allow you to use as an email set field. Pull that field back into your workflow in place of your other Approver field and try it. Cross your fingers 🙂