The problem is with jrMeta ver 1.1.2. I've rolled that module back to jrMeta ver 1.1.1 which fixes the issue for your site. We'll get the module fixed up.
Thanks very much for finding the issue. Sorry for the hassle.
The location for the skin in the database is:
TABLE: 'jr_jrcore_setting'
Locate the row of jrCore active_skin and change its value to whichever skin you want. It may take time to clear the caches if you have them on.
If you want to send me your admin login details I can take a look at what the warning/error is in site builder, but I'd need an admin account to see that section of the site.
Send details to support at jamroom dot net along with a link to this thread.
The import process takes the GEDCOM file and puts the data contained into the sites database under an assigned tree.
Once it has finished you will see "finished importing GEDCOM file"
Then "The GEDCOM file was successfully imported".
After that the database connection is no longer needed for importing but will still be needed to view any of the information that is now in the database.
Whats the URL of the page? there may be some javascript errors in the console that will give you more information. on Firefox hit F12 to open the developer panel, then select the CONSOLE tab to see if there are any errors.