My domain was recently transferred to a new hosting account, not by my choice. Now it doesn't work and they are telling me to have my developer fix it. It worked fine on my last host. When I try to access the site I get this:

Fatal error: Call to a member function query() on null in /home2/bigjohn767/om-im.org/updates/concrete5.6.3.4/concrete/core/models/package.php on line 4

Any idea of what might be causing this?