It could be you are caught up in the current Google process failure.  Home based businesses, or businesses in industries that are often home based, are getting these calls from Google and then their listings disappear.  Google is working to correct this.

It could be that you just recently PIN verified your listing, after which it will not show up in search results and display a "Location not supported" error if you attempt to view it from your Dashboard for 1-2 weeks while it is being refreshed in the index.

In either case, your best course of action is to wait for 2 weeks after entering your most recent PIN to see if the problem clears up on its own.