Firefox can’t establish a connection to the server at wss://
I have installed Ratchet websocket through for my website that is under https:

`php ~/composer.phar require cboden/ratchet`

then I have set the bin/server.php:

```
<?php
//[...] class Chat
$server = IoServer::factory(
    new HttpServer(
        new WsServer(
            new Chat()
        )
    ),
    8888
);
$server->run();
```

then I have enabled mod_proxy.so and mod_proxy_wstunnel.so:

```
root@ubuntu:~# a2enmod proxy_http 
root@ubuntu:~# sudo a2enmod proxy_wstunnel 
root@ubuntu:~# sudo service apache2 restart

```
After that I changed the file /etc/apache2/sites-available/000-default-le-ssl.conf and added this line:

```
<IfModule mod_ssl.c>
<VirtualHost *:443>
        ProxyPass /wss2/ ws://mywebsite.org:8888/
        ...
```

And runned this:

```
sudo a2ensite default-ssl.conf
sudo service apache2 restart
```

After that I started the server:

`php bin/server.php`

And now I connected in the webpage that has this socket connection:

`const ws = new WebSocket('wss://mywebsite.org/wss2/?1b70ee9e56888665cfbde77ec832de8a');`

But I obtain the title error. In localhost environment I don't have any error and the app works

Environment:
- ubuntu-20.04
- apache2.4
- php-8.1
- Digitalocean