Symptoms

Form Rules Cannot be edited when clicking Finish button
 

Diagnoses

When editing the form rules, a subview will be opened, after editing clicking on Finish button, the subview remains unclosed after loading (no matter how many times clicking on Finish Button)
Suspected large form size causes this issue.
 

Resolution

During the session, we increased the maxrequestlength value in the smartforms designer web.config to 2097152 which resolved the issue.