Here is the message I get when I go to my website: (martyhulsebos.com)
Something went wrong
Unable to find the module module-theater.Have you removed this from backlight/designer/modules? If so, either copy the module back, or change the template used by this album. in EngineFactory.php on line 405
My guess is that you had a Theater Vegas slideshow inserted on the home page.
You can try either disabling the Insert Album feature on the page, replace the album with a standard Pangolin album, or get the latest version of Theater, create a new template and assign it to the album.
Check your Modules page to see if the Theater add-on is there. If so, install it. If not you’ll need to purchase the BL3 version.
Thanks Rod. My template was Okapi based and upgrading is solving the problem. The upgrading process is leading to some additional questions, but I will post that separately.