Can you be more specific? When? What dialogue? What do you see?

When the characters such as Heike and the leader of the expedition have finished talking and when the 3 cheks go off the map, the game continues to play but I can not do anything is as expected a character who speak or as if a character spoke without being seen what you can correct the problem please? it's the 4th mission

What is the last line of dialogue spoken? Will make it easier to pinpoint it.

same problem he leave and then nothing.

Hard to say exactly where the bug is hidden but I've inserted a lot of safety nets so if something gets stuck during the intro it should proceed anyway after a short time.

I know what this bug is, in mission 2, if Aviradze dies, the mission fails, but he can die in mission 3 without failing the mission. If that happens, mission 4 intro script will get stuck on the Aviradze movement out of the map, since he's dead and not here to move. It would make much more sense to fail mission 3 if Aviradze dies since he shows up later in a cutscene. I just tested it and it seems to be fixed now.