WARNING: Port 443 of computer does not appear to be accessible using hostname:

My domain is hosted with Cloudflare and has the orange cloud enabled.

When I installed it, I got the following error message: WARNING: Port 443 of computer does not appear to be accessible using hostname: www.mydomain.com.

How to solve the problem?

Hi,

You can:
Either disable the orange cloud and the forum will install as expected.

or

Configure forum to use cloudflare, which is a complex process but will let you use the cloudflare security and performance improvements

You still need to disable the orange cloud in order for let’s encrypt to generate a certificate.