When I start a new game with Nicks Coop, the game gives me the next text:

An error has occurred. If you continually get the same error, try loading a different save file, submit a bug report, and/or check the Support Forums for assistance.

POSTAL 2 Build Oct 6 2016 17:43:47

OS: Windows NT 6.1 (Build: 7601)
CPU: AuthenticAMD Unknown processor @ 2913 MHz with 894MB RAM
Video: ATI Radeon 2100 (647)
Level: Entry - Untitled

Failed to enter Startup:

History: UGameEngine::Init <- InitEngine