The mod works without problems after the 25th Anniversary Half-Life update, except for one point. There were small problems with the background in the main menu. This is fixed in this patch.
In the update for the 25th anniversary of the game, Valve decided to get rid of the old background by making it completely black. And I used only part of the background, so after the update half of the background in the mod was just black. So I decided to fix it, but adding the missing pictures seemed like a one minute job, so I decided to play with the animated logo that was added in the update.