Squidguard blacklist notification

[revengineer]

Hi,
I am new to pfsense and could not find a satisfactory solution to the following problem. I installed the squid and squidguard packages. When I try to go to a blacklisted page, I get the web error "400 Bad request The plain HTTP request was sent to HTTPS port nginx".

This was previously noted in post https://forum.pfsense.org/index.php?topic=115115.0. The work around is no move the web GUI from https to http.

I have tested this solution and it works. The workaround is not entirely satisfying because security is compromised using unencrypted http access to the web GUI.

Is this issue a bug? Or can this be fixed through other configuration options? I have worked myself through most of the configuration options but have not found anything obvious.

Any help is greatly appreciated.