My domain is: mielbio.fr
My web server is (include version): Apache 2.4.6
The operating system my web server runs on is (include version): CentOS 7.9
I can login to a root shell on my machine : Yes
I'm using a control panel to manage my site : Webmin/Virtualmin
until yesterday everything worked fine, but since today I have a problem with our internet shop. The bank is OK for the online payment but does not return to our shop.
The bank says:
SSL certificate problem: unable to get local issuer certificate
The messages of ssl checkers says
Incomplete certificate chain / verification server down / invalid signature chains
TLS Certificate is not trusted
or Chain cert missing
What can I do?