Why in the world would you even consider marking comments or attachments as private on bugzilla?
The purpose of a bug report is to provide as much information as possible and reasonable for the maintainers to find and fix bugs. As I understand it using ‘private’ would limit the number of eyes that may be able to read the posted info and thus would make triage and finding a solution much harder.
You should never post personally identifying information on bugzilla anyway.
I regenrated a API key on bugzilla redhat and configured it in Problem Reporting. Same error
--- Running report_uReport ---
('report_uReport' completed successfully)
--- Skipping collect_vimrc_user ---
No matching actions found for this event.
--- Skipping collect_vimrc_system ---
No matching actions found for this event.
--- Skipping collect_GConf ---
No matching actions found for this event.
--- Running collect_xsession_errors ---
Element 'xsession_errors' saved
--- Running analyze_CCpp ---
Generating backtrace
Backtrace is generated and saved, 38262 bytes
--- Running analyze_BodhiUpdates ---
Looking for similar problems in bugzilla
--- Running report_Bugzilla ---
Checking for duplicates
Creating a new bug...
Failed to create bug.
Server says: 401 Unauthorized
{"code":113,"message":"Sorry, but you are not allowed to (un)mark comments or attachments as private.","error":true,"documentation":"https://bugzilla.redhat.com/docs/en/html/api/index.html"}
('report_Bugzilla' exited with 1)
It uses your api key to tie the report to your FAS account, but nothing else seems to be personally identifying. Thus the private marking is different than a routine bug report.
Your FAS account name cannot be considered personally identifying since it is publicly available with every post made on Ask.fp.o.