MPC is trying to log me in to something

Hi,

sometimes, when I open a video using MPC, I get an error box saying

Failed to log in to "*chinese writing* as user ""

It's difficult to emulate as it only happens once every few days. I also tried opening MPC with no internet and this error does not show up.

I'm a bit concerned as it seems fishy.

Why is this happening? I cannot find anything in the settings about logging in. Thank you.

Edit: It just happened again so I got a screenshot:

That is from the automatic subtitle downloading. The server must be refusing the connection for some reason.

You can turn it off here:
Options > Subtitles > Misc

Thank you! Will do