Poptropica Astro Knights help!?

The mouse is gone and I can't get the owls interest. I have already lured the mouse with the cheese and caught it, and I gave it to the owl. The game glitched for a second, but everything was fine at the end. When I left the area, I came back to find he had no interest in me. I cannot refind the mouse, I cannot go back into the library, and I need the owl to pick up the vial the robot dropped.