"The program can't start because D3DCOMPILER_47.dll is missing from your computer. Try reinstalling program to fix this problem."

If the devs see this, please help. I'm wary of downloading dll from random websites.

Same here. Verified integrity just now. Nothing.

Sad, well I'll be playing Eternal Crusade until this gets looked at 

I have tried starting the game. Neither desktop shortcut or the Steam " Play " button produces anything other than the small Steam window stating the application is trying to start for approximately 2 seconds and then the window disappears with no further action. All files validated with the 5.3 gb update performed.

32 gb ram
FX 9370 CPU 

Radeon R9 390 4GB Video

Same Issue. Trying to launch it from the steam library folder tree says,

"The program can't start because D3DCOMPILIER_47.dll is missing from your computer. Try reinstalling the program to fix this problem."
Validating files was successful. Still same issue.

steam>steamapps>common>warhammer 40,000 inquisitor - martyr

Doing this got the program running for me. I did get one network error message but I quit the game and then restarted and then selected the run game from the steam library drop down menu and the game fired right up. I hope this helps some.

if you rename the "D3DCOMPILER_46.dll" to "D3DCOMPILER_47.dll" it should work, found in another post and worked for me hope that helps.