Error 503 Service Unavailable when using OLS with CyberPanel

#1
I am using CyberPanel 2.3.8 (latest) and OLS 1.7.19 was installed automatically when installing CyberPanel.

On OLS, I have configured listening on 2 ports 80 and 443 for both IPv4 and IPv6:

listener list.jpg

However, after a while, OLS will automatically add 2 listeners named SSL and SSL IPv6. Both of these listeners will have Virtual Host Mappings to my site, but since I added my site to the listeners I created above, I often have to delete these listeners.

If I don't add my site to any of the Virtual Host Mappings of the listener or add my site to the Virtual Host Mappings of the HTTP IPv4, HTTP IPv6, HTTPS IPv6 listeners then a 404 Not Found error is returned.

And I just need to add my site to the Virtual Host Mappings of the HTTPS IPv4 listener, it will immediately return the error 503 Service Unavailable The server is temporarily busy, try again later! regardless of whether I add my site to the Virtual Host Mappings of other listeners or not.

All the <HOST_NAME>.error_log file shows is:

Code:
2024-11-11 20:05:43.914265 [NOTICE] [7139] [172.70.147.46:28868:HTTP2-3#<HOST_NAME>:proxy] oops! 503 Service Unavailable
2024-11-11 20:05:43.914272 [INFO] [7139] [172.70.147.46:28868:HTTP2-3] Content len: 0, request line: 'GET / HTTP/1.1'
2024-11-11 20:05:43.914278 [INFO] [7139] [172.70.147.46:28868:HTTP2-3] Redirect: #1, URL: /
Since my site is using Wordpress, I also tried changing the PHP version, but whether I change to PHP 7 or PHP 8, I still get the same error.

How to fix this error?
 
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