Under game freezes after completing missions patch: v2.1.0f.4

WFO The Under games Patched: v2.1.0f.4 GOG Version

First of all big fan of yours Brightrock games, you have created one of my all time favorite game WFO.

Problem:

Shale mission 2, game freezes after completing this mission.

You can see the game is active after completing this mission, but continue or next level buttons don't appear on screen.

Had the same problem with Shale mission 1, but after reloading couple of times the game got to the next stage, not working

on mission 2. Reloaded my saves several times, freezes each time I finish mission 2.