SSL Error After Switching DNS to 3rd party website builder

Hi, I decided to use Canvas by Siteminder as website builder. After I updated DNS setting (TXT and CNAME), my SSL website is not working, I tried to run auto-ssl but get this meesage: example.com The system failed to fetch the DCV (Domain Control Validation) file at "example.com/.well-known/pki-validation/5F9AEFB7BAA5F54566A19C2BEC3A3FE4.txt" because of an error: The system failed to send an HTTP (Hypertext Transfer Protocol) "GET" request to "example.com/.well-known/pki-validation/5F9AEFB7BAA5F54566A19C2BEC3A3FE4.txt"' because of an error: Could not connect to 'example.com:80': Connection refused . The domain "example.com" resolved to an IP address "x.x.x.x" that does not exist on this server.
and on because of an error: Could not connect to 'www.example.com:80': Connection refused . The domain "www.example.com" resolved to an IP address "x.x.x.x" that does not exist on this server.
Please advise how to fix it Thank you