Quick blog on how to fix the error you get when you save a record which has some required fields on the header of the form and CRM shows the schema name instead of display name like below:

it shows the error which includes specific field logical name instead of display name which might be confusing for user and doesn’t look very much user friendly. In my case its still very much understandable but sometimes people change name on the form and in that case it will be worse situation.

FIX :

All you have to do is put the same field on the form which is there on the header and hide it on the form. Open the form editor > select the section > look for the field and add it. Go to field properties and hide it by unchecking the visible by default box:

Save and publish all your changes and now try to save the record:

I hope this help!