Plutonium

Does anyone know how to fix this error message? I have been trying to play some xSanchez78 Der Riese Mod and I get this error everytime, even whem I tried it with T4M.

PLEASE HELP

@i-need-heart whats the console command to start solo

Hadi77KSA The mod is not working can you help?

The Download link for this mod is gone and I really want to play it.