Server crashes after changing map (server is changing level)

[Simsari]

Hi Community of Garry's Mod,

my problem is, that when the map on my (TTT) server changes, my server get stuck for 3 minutes and then crashes! Yesterday it worked all fine... :(

But since I restarted my server (on Nitrado) and deleted a workshop map from of the maps folder, my server crashes! I'm in big trouble, if it doesn't get fixed! :(

Please help me!

Thanks for every single answer!

~Simsari