Mass import from local path not working.

I am trying to import images into Acidfree now that I've upgraded to ver 6.x. I select the taxonomy for all items and then select the local import path. When I click the "Import" button, the page just reloads itself. I get no errors. I tried disabling all modules (including core modules), but the same thing happens. Uncertain how to troubleshoot this issue. I saw a similar issue to this in the queue, but they said their issue was resolved by disabling a module I don't have.
Thanks,
Jonathan