This problem keeps coming back and my only solution so far has been to uninstall and reinstall AME.
Adding media just stops working, the plus sign, ctrl-I, drag and drop, double clicking on empty, nothing works. The connection between AE and AME still works however, so if I want to queue something I have to create a comp in AE and sen it from there.
This error seems to occur after encoding image sequences, my AME has been running fine for a while now but the bug just popped up again after having encoded a tiff sequence.
Ideas?