aaPanel_Kern
Your certificate, as I see it, appears to be a domain-issued certificate. As I mentioned, the WAF operates with certificates generated for regular domain names. However, if it's an IP-issued certificate, it will encounter errors. The errors only occur in the SSL configuration of the website, while the SSL configuration of the WAF panel in image 2 shows no errors. I generated this SSL certificate based on an IP from zerossl, as shown in image 3, and I suspect that during the SSL setup for the website, it's not allowed to operate on the IP, resulting in the failure to obtain the certificate. I suggest configuring it similar to Aapanel or like the WAF settings.