Issue when moving the theme to production

Hello,
The plugin works great, thank you. My only issue is that after I created a child theme, I moved the site from the test server to the production server. In order to do this, I simply moved the child theme files to the themes directory on the new server. I also installed the child theme configurator plugin on the new site in case I wanted to modify the child theme. However, now, when I go to the backend of the new website, the plugin does not work as expected: the files tab appears empty so I cannot add new files to the child theme. I also get this warning on both sites: “This Child Theme was configured to accomodate a hard-coded stylesheet link.” I guess I did not follow the right procedure in order to move the child theme AND the plugin. Is there any way I can fix this now?