Sorry, there's a reflection cubemap there that I forgot to include in the addon. If I ever release another update to the map, I'll fix the issue. In the meantime, you can either mount HL2: Episode Two, or disable reflections entirely by opening the in-game console (Shift+Esc) and entering the command mat_fastspecular 0.

I have the episode two mounted and its
still doing the error

Have you tried restarting the game? If that doesn't help, open the console (Shift+Esc) and enter the following command:
If the console shows a 'File not found' message, it means that HL2: Episode Two either wasn't mounted correctly or that you need to verify its integrity.

ok it helped i verified and now it works