404 not working for SSL Default

[asmwp]

Checklist

• Have you pulled and found the error with jc21/nginx-proxy-manager:latest docker image?
  • No
• Are you sure you're not using someone else's docker image?
  • Yes
• Have you searched for similar issues (both open and closed)?
  • Yes

Describe the bug
I have installed the docker image of the latest NPM. I have manually added a wildcard SSL certificate. I have configured NPM to use a custom 404 error page. I have not yet created any hosts.
When I browse using HTTP to NPM i.e. http://site.domain.com, I correctly see my 404 page.
When I browse using HTTPS to NPM i.e. https://site.domain.com, I do not see my 404 page but instead see 'This site can't be reached' and 'ERR_SSL_UNRECOGNIZED_NAME_ALERT'.
Is there something else I need to configure in order for the 404 to work for SSL also?

Nginx Proxy Manager Version

To Reproduce
Steps to reproduce the behavior:

1. Go to settings, default site, edit, select custom and paste html
2. Go to SSL certificate and add custom certificate.
3. That is all, do nothing else
4. Open browser and enter http address and will see 404 page
5. Open browser and https address and will not see 404 but error ststed above.

Expected behavior
When browsing to a non existent HTTPS web address I see my 404 page.

Screenshots

Operating System
Docker Desktop on Windows Host

Additional context