[abdulsami34]

Hello, I'm experiencing this problem

your map de_*****.bsp differs from the server

Each and every map.
I changed a ram, and this started happening since then. no map works.
It's a vanilla server.

[DarkDeviL]

Corrupted map file on your client PC.

Delete the map on your client PC, and then re-join the server, which will make your client download the map again.

[abdulsami34]

cannot tell 400 people to delete all their maps :/. Any other work around?

[DarkDeviL]

Files that already exist won't be re-downloaded, so no.

[abdulsami34]

Last time i fixed this by deleting the map and reupdating the server it worked, but now the files aren't downloading

[ghostofmybrain]

If it's a vanilla server and it happens on every single map to every single person... try reinstalling the server.