Since new Cloudflare Webinterface server not accessible anymore

Since new Cloudflare Webinterface server is not accessible anymore?
My Websocket Connection through Clouddlare is not accessible anymore. I did not change any setting neither on the server nor on cloudflare.
What did cloudlare change?
My Websocket Connection stays in ready State 3.

Can someone help me please?

May I firstly ask is the WebSockets option enabled at Cloudflare dashboard for your domain under the Network tab → WebSockets option?

How can I use WebSockets with Cloudflare?
No additional configuration is required to send WebSockets traffic through Cloudflare. Cloudflare will immediately begin proxying your WebSockets through to your origin.

Furthermore, you are running WebSockets (WSS my best guess?) over an supported and compatible port with the Cloudflare proxied (:orange: cloud)?

Ports list compatible and supported when using :orange: cloud (proxy mode) on Cloudflare can be found here:

Also, regarding WSS, it has to be working over HTTPS, or better to say your SSL option has to be set to Full (Strict) SSL at the SSL/TLS tab of Cloudflare dashboard:

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Never mind I found it.
I had to renew my SSL certificates on the server.
I am new to SSL. Why did I had to replace the files?
They were valid more than half a year?

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