Script no add ip route for new client (peer), OS Ubuntu, solved

[michalachim]

Hi, I use this script to add clients. My server is on a VPS. Everything works correctly. I currently have 10 clients. I can't add more clients 11 and above. The script creates an account, but the client does not have access to the Internet and it is not possible to ping from the VPS to the client. I can see the handshake on the VPS ok. I have Ubuntu 20.04 on my VPS. I've been using the script for over a year and never had a problem. I can only add up to 10 clients, it works fine. Why is client number 11 and above not working? Is the number limited to 10?
Ping from VPS to clients (10.66.66.2-10.66.66.10) is OK. PING to 10.66.66.11 - and above not response and not internet on this IP's. Isn't there a script problem? I tried to restart VPS and clients. Please can you help?

[michalachim]

After a long search for the problem, I found a problem and solution for me!

Add client (peer) over this script not add ip route in OS Ubuntu !
It is necessary to manually add this commmand, for example: ip route add 10.66.66.10 dev wg0 scope link
For each new client :((

I don't know why, I'm not a programmer. Is there anyone who explains the problem?