Message received in Logs / Log Summary under HTTP Server:
Unescaped left brace in regex is deprecated here (and will be fatal in Perl 5.32), passed through in regex; marked by <-- HERE in m/\G%({ <-- HERE .*?})?./ at /usr/share/logwatch/scripts/services/http line 319.
Requests with error response codes
401 Unauthorized
/cgi-bin/index.cgi: 2 Time(s)
This has been occurring for a few releases.