It is possible that the template may have been updated in the midst of a previous sync. If you have customer admin rights in NFS Portal, please try the following steps:
1. Unassign the problem template from your user account
2. Sync in the app
3. Reassign the template back to your user account
4. Sync in the app
If you do not have customer admin rights, then please contact the person in your company who sets up users.
If the app continues to close after the reassignment, then please contact naturalForms Support.