Symptoms

When entering text in the Description, any characters not A-Z or 1-10 cause an error message that "Special characters are not allowed."
 

Diagnoses

Was able to reproduce the issue in test environment. This is a design feature because K2 has the ability to expose .API file and it gets tied into a URL. We do not allow special characters because when it goes to reach out for the URL it will break the syntax.
 

Resolution

Please remove any special characters in your description in order to move forward.