It was found that when 'Adding' a new Protocol Group, a web page with the error message:
"The Page you were accessing has encountered an error." appears. This only happens when 'Adding' a new entry. Listing entries works correctly.
This is due to some code changes that were made for 21.2.1 and 21.2.2.
Release : 21.2
Component : NQRPTA - REPORTERANALYZER
This will be resolved in NFA 21.2.4.