My Ipv6 Proxies run on localhost but not on server

My proxies do not work on the server. It works smoothly when I try it on localhost.

Server : Google Cloud (USA - Lowa)
Proxies : USA

- I test using the same codes.
- I extended the timeout period in order not to have a timeout problem.
- I pull the data from Instagram

Is there a special setting for ipv6 on server? I can not understand why this problem occurred.

Thanks in advance for your valuable answers