Problem running Traccar in subdomain centos 7

Problem one solved after disable cache, I added this to my virtual host config.

Header set Cache-Control no-cache
Header set Expires 0

But I don't know yet if it might affect anything other than performance ?

The login issue could be an issue with cookies.

Hi finally yesterday i managed to fix my issue.
The problem apparently from my server which has Nginx installed as reverse proxy to apache which causing Websocket issue.
I ended up using Nginx configuration from this topic and it worked like a charm.