When I set a local password in Web Proxy, it turned out that no password over 8 characters works. Passwords of 8 and fewer characters work fine.
Hi szyman and welcome here,
it seems that a patch is already on the way --> https://patchwork.ipfire.org/patch/2765/ .
Thank you for the information.
This is very good news for me - I think the topic is close.
Maybe never closed. I have same issue right now and with last 2.7.161 version, proxy password in chpasswd.cgi page are truncated to first 8 chars.
Btw. Solved, same mods are to be apported also in chpasswd.cgi and all works well now!