Bingo! I didn't had Legend of the Beast, not anymore! Works like a charm, The Temple of Hatshepsut got mental renovations. Thank you for the help!

Do you have all the required Serious Sam games? HD (Both First and Second Encounters), Legend of the Beast, Serious Sam 3 and Jewel of the Nile?

Can someone help me? I wanted to play this mod, but I just can't make it work. I downloaded the parts, assets, and extra requirement files too, I have 30 folders in the Fusion workshop, 17,6 GB of space, but I cannot load levels.

There is however a few maps I can play, like Tomb of Ramses III or Sacred Yards, but no matter if I complete them, the next level will always unable to load.

And the error messages? Content errors as far as I understand. Like in the Tomb of Thutmose: "Cannot Open File Content/SeriousSamHD/Textures/Effects/Dust/Wind_01.tex

It didn't even seems to me that the problem would be with the downloaded files, very strange. I read somewhere to delete a Fusion .ini, but that didn't helped neither.