I would like to see at least one end of a mission. Very disappointed, even when its and alpha version. How I am supposed to test when I can only play like 10 minutes in a row and then I have to restarted the whole mission.

And as it seems here on the forums I am not the only one with this problem

Yeah at this point from talking to a bunch of people on the Discord server it looks to be a lot of network issues causing the crashes.  But someone on Discord named Aprosule added settings to their launch parameters in Steam and I also did this and it seemed to help.  I only got crashes from weapon switching and the occasional container destroyed. But I got rid of the 10-15 minutes crashes and was able to complete missions.  Just keep in mind this is all experimental still but it improved my game for now to where I can at least play for more than 10 minutes.

Steam Launch Parameters:

• Right click on Warhammer 40,000: Inquisitor - Martyr
• Click Properties>Set Launch Options
• Add: -single_core -forceservice -high  -LANPLAY -NOTEXTURESTREAMING
• You also need to set the Warhammer_x64_11.exe to run as admin.

Again no guarentees this works but some people have reported success.  Also all credit goes to Aprosule and the others on Discord for testing these settings.

this fixed it for me