N2W Server may display error "Problem Occurred (500)" during the Identity Provider configuration

Summary

N2W Server may display the error "Problem Occurred (500)" during IdP configuration:

Error message:

A Problem Occurred(500)

Sorry, but there was an error while processing your request

This error appears after you hit the 'Apply' button.

Description

The most likely reason for this is that an invalid X.509 certificate file has been provided.

Please check the file you have uploaded at the Identity Provider at the "x509 cert:" field is a valid type of certificate.