I need to be able to sort a lookup column. I made this possible by unchecking the "allow multiple values" option in list settings, however now I cannot edit existing entries in the list. When I try to edit I get this error message "There has been an error while loading the form because the fields in the form and SharePoint list do not match. Contact the list owner to update the form." (I am the list owner) When I open the form in InfoPath I get this prompt: "One or more fields in the SharePoint list have changed. Do you want InfoPath to update the set of available fields? You may need to add or modify your form view to add or remove the updated fields." I click "yes." Then I try to publish the form and get this error message "The publish operation cannot be completed. It cannot be determined if the form template was successfully published. Try publishing the form template again, or change the list settings to use the default SharePoint form. Details: The SOAP response indicates that an error occurred on the server: Server was unable to process request. ---> Object reference not set to an instance of an object. "
The form is not published. How do I fix this?