Hi there,
I’m pretty new to all of this but while I work my way through things I wanted to put my site up with and under construction notice. I started with a demo theme, added the Under Construction extension and added logo, text, and custom color under the extension theme. However, when I check the site when logged out I get a page saying “503 There was a site connection issue. The server was unable to connect to the site. You might try refreshing the page. If you continue to get this message, you should contact the site owner.” When I turn the extension off, I can get to the site demo with some of the other changes I’ve made. I still have the extension turned on, and you can visit the site at talentlabcollaborative.com