For those who could not use the timer with ''E'' key (just like me) use ULX to enable, the only difference is that the nickname of the player who activated appears. You will also need to download the Hide & Seek Round System mod.
- Download ULX, ULib and the other ULX mod from the Gmod workshop and the Hide & Seek Round System
- Enter the game
- Start a Game
- Type !menu in Chat
- In the command tab you will have the option Hide and Seek or something
- Choose the Seeker
- Right below has the timer option, just activate. And Finish!
DISCLAIMER: used google translate, so if you don't understand anything, tell me.

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=557962238
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=557962280
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=718665054
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3473572139