I have created a workflow using the OOTB Approval workflow template in SP 2010. When I run the workflow, it sends a task to Outlook with the "Open this task" button. When I click on Approve, Reject or Change, it pops up an error message that says "This task could not be updated at this time". I opened the task form in InfoPath and noticed that buttons on the approve form all have rules set up to submit data with data connection of "Approved", "Reject" and "ChangeRequest".
I wonder if the data connection in InfoPath is what's causing the problem? Does anyone have any solution for SP 2010?