@subven
@girish Nope, dont use Cloud, but thx for answering, im trying fix my problem.

Hello, I set up a server on the local network, if I go through the web interface (https://matrix.test.rus), then I get to the server without problems, if the desktop client Element or some other is used, I get an error: URL does not appear to be a valid Matrix homeserver

What could be the problem ?

config:
server {
listen 80;
listen [::]:80;
server_name matrix.test.rus;

location /.well-known/matrix/client {
return 200 '{"m.homeserver": {"base_url": "https://matrix.test.rus"}}';
default_type application/json;
add_header Access-Control-Allow-Origin *;
}

# Redirect all HTTP requests to HTTPS with a 301 Moved Permanently response.

return 301 https://$host$request_uri;

}

server {
listen 443 ssl http2;
listen [::]:443 ssl http2;

listen 8448 ssl http2 default_server;
listen [::]:8448 ssl http2 default_server;

server_name matrix.test.rus;

ssl_certificate /etc/ssl/private/matrix.crt;
ssl_certificate_key /etc/ssl/private/matrix.key;
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_session_tickets off;
ssl_protocols TLSv1.2 TLSv1.3;
ssl_prefer_server_ciphers on;

root /var/www/element;
index index.html;

location /.well-known/matrix/client {
return 200 '{"m.homeserver": {"base_url": "https://matrix.test.rus"}}';
default_type application/json;
add_header Access-Control-Allow-Origin *;
}  



location /_matrix {
    proxy_pass http://localhost:8008;
    proxy_set_header X-Forwarded-For $remote_addr;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header Host $host; 
    
    client_max_body_size 50M;


} 

}