Other than approved (propaganda and government) websites, the internet has generally been shut down in Russia. Using a VPN will land you a jail sentence. Alterr probably cannot upload any updates.
Sorry, but this is the first time I have heard anything like this. I cannot imagine Alterr being a target for creating Train Simulator content. By the way, we are drifting into politics, which RailSim does not appreciate at all—and perhaps for good reason. Let us keep the discussion focused on train simulation.