Can't use authenticated proxy with UC

[aspirin37]

Hi! I'm trying to make authenticated proxy work in UC mode but I'm getting this error. When I turn UC off, everything works as expected and IP changes, but I need the UC functionality as well. I work on MacOS. Also if I stop passing proxy url string in settings after getting this error, I still get a proxy authentication system popup, until I clear chrome_sessions dir

[mdmintz]

Proxy auth with UC Mode is working for me.
Next time, provide clear steps to reproduce, including code, SeleniumBase version, and Chrome version.

[nyx-rattapoom]

@aspirin37 try check this might relate to an issue #3920