Importing doesn't seem to work in DNN 5.0.0. The module doesn't even show up as IPortable in Module Definitions unless I remove the name space listed after the comma in the Business Controller Class field. After removing the namespace, Import Data and Export Data show up in the actions dropdown, and Export seems to work correctly.  However, Import Data results in an empty string being inserted into the database, so the module throws an error, and I think it's when it tries to substring the last three characters of a zero-length string.

The module works fine in DNN 3.3.7, so I'm wondering if it's a problem with ImportURL.  I can't seem to get my changes to take effect when I try recompiling the module, so I can't test it.  Has anyone else run into this problem?