New Data to Admin Resource Error

[sdancer75]

Entering a new entry to the Admin Resource shows an error bar without a description.

https://ibb.co/kx2XjfM

This happens when I select from the Action --> [Save Submission] to save submission to "Admin". When it's empty it works.

https://ibb.co/4V7WgnD

Is that normal behavior? As far as I understand the admins should be saved to Admin resource, Users to Users resource, and so on.

Thanx