"Can Not Join Server Because You Can Not Download The Files"

[Chopp_]

I have no idea why this pops up, its only some servers, but even with the correct mods installed it pops up saying "your wads you have downloaded can not be played on this server"
https://imgur.com/a/JScEE3H

If someone can tell me how to fix it that would be great

Edit: When I join a server (witch is not all of them, but a few) its starts to connect to the server, then kicks me out with the message

 

[Wumbo]

Don't add them before joining. SRB2 automatically downloads and/or adds files when you try to join the server as long as it allows it, and there's a large chance that it does. If the server includes files too large to be added automatically, then perhaps you added the wrong version of the file. If this is the case, check the Master Server to see if the name of the file you have matches up with the one added to the server. Also, don't rename downloaded files or you'll break its compatibility with most servers.

 

[Chopp_]

Ok? idk if this really helps but hey thanks for the information