Watch the video:
Timestamps:
0:00 - Explanation
0:13 - Run as Admin
0:51 - Downloading a new steam_api64.dll
1:24 - Steam Overlay
1:56 - Verifying steam's files
One of the less common issues with Resident Evil Village is the Steam_api64.dll error. This video covers this niche topic and should let you play the game as normal by the end of it. While this problem could be caused by many things, this video covers the more general solutions that should work for you.