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Version 1.0 has issues with certain types of video cards. These are fixed in the patches. I recommend installing patch 1.4, and then 1.5 on top of that. You can install 1.6 directly on 1.0, but it has glitches that appear when playing through the campaigns. The same glitches are present in version 3.0.
However, there is a mod that somewhat fixes these glitches. I will check the effectiveness of this mod soon. In this mission, I only need to defeat the berserker and obtain the Blindness spell for Shadia, and also find the Tear of Ashi. I don't see any problems. In the next mission, thanks to the latest version of this mod, the first demon should go to the first castle instead of the second. Without the mod, it won't go anywhere at all in version 3.0.
I didn't have any problems even with the integrated 96MB video card. However, I didn't play versions lower than 1.3. Of course, with the minimum graphics settings.
After installing the patch, you need to start the mission again through the campaign menu.