Gmod Darkrp Problems

Hello! I own a gmod -Garrysmod- Darkrp server. The server has custom job’s. and runs with Ulx. Everything was going perfect till one day it randomly change’s. and new joiners can now not use “q” menu and the chat. - they can send messages in chat but not see them or see/receive any from online players- This has happened to my server’s 4 time’s now. each time i got a new server. Please please help me! it’s a server problem and not a singleplayer etc. i know that much!

Thanks in advance for any help!

If you use fastdl its because you need to upload latest cache from gmod server to website