Wired or WIFI connection?
Normally wired, but I also have tried WIFI and did not work.

When the disconnect occurs/How often?
Every single time I try to log with the specified character (My main), I see the loading screen and immediately gives me the 10105 error. I also get this error when trying to log in using my laptop, but not if I use a private connection

Have you tried bypassing the router and directly connecting to the modem for testing?
The modem at my house is in a different room sadly.

Internet Service Provider: it's called Infonet

Location/Region you are in: I currently reside in Brazil :c