I cant launch the game. Server return 500 error and i cant login.

I decided to play the boxed version of Cities XL 2012 which I had not played for several years. All was running smoothly until tonight, when it started pausing each time I made a command of any sort. I have about 7 maps set up, most have small populations only 2 have reached above 50,000. Is there anyway to sort this issue?...

When attempting game startup, Windows 10 reports that the site to enter the Steam Code and/or create an account for Cities XL has had its Security Certificate revoked. How do I get this game playable? Thanks.

Sometimes, when I start a new map, it becomes Impossible to set up a City Link. Does anyone know why?

I get the game yesterday. My account has been created. But when i try to log on, the message is "invalid characters in login". Does anyone had the problem, or anyone knows how to connect ?