When you create the connection of SharePoint on premise to the end user on his mobile device, you have to change the title of the field from user name to email or fix the issue there.
almost the end users had write the user name only and if you didn’t write the full email the connection will not working, it will show you the below message on the top of the screean
You don't have permission to create this row.
Server response: clientrequestId:xxxxxx-xxxx-xxxx-xxxx-xxxxxxx
Kindly check this issue