Hello, prosciutto. I am sorry you have been experiencing game crashes in Rainbow Six Siege. If the crashes have kicked you out of a match with the same error message on the main menu screen, please try following our steps shared in this guide[ubi.li] to remedy this issue in future games. Please ensure that any VPN software you use is disabled, as this can cause problems during a match. However, if the game crashes have frequently been landing you back on your desktop screen, please give our steps here[ubi.li] a try to rule out any potential interferences that could be the leading cause of this happening. After you have exhausted these steps and the problem persists during other matches, please don't hesitate to let us know on this page here[ubi.li] to continue reviewing this with you. Thank you so much!