I’ve finally gotten past all the finagally little hidden configuration tweaks you have to make to get Concrete to install only to log into the site (v9.2.2 with the Elemental demo site) and be greeted with a popup that I can’t make go away:
I don’t know where it got that “webmaster@” email address because that does not exist anywhere. And I also can’t figure out what the actual nature of the error is. What do I do?
This looks like a webserver error so that domain is likely the domain associated with your hosting account. It might be worth reaching out to your hosting provider about configuration. You might also temporarily disable pretty URLs because it looks like it might be a rewrite error due to webserver configurations.