I've just a done a clean install by the book of CiviCRM 5.24 on Drupal 7. The installation went smoothly. Now I'm seeing an alert about the Resource URL being incorrect (it isn't). I seem to recall that this was an issue a year or so ago. Is this a regression that has crept in to the latest version, or am I doing something wrong? I have other D7/Civi installs on the same server, all with earlier versions of CiviCRM, and none of them are exhibiting this behaviour.
The Resource URL lookup uses the PHP setting curl.cainfo to look up a certificate file, e.g. CACert.pem to validate the server certificate. I found the problem went away when I added the server certificate to that file.