I warped into another system (only the third system total, including the starter system). Got two missions. Did one (kill pirate), went back to station, handed in, and… now I'm stuck there: Right-click doesn't get me out. Escape doesn't get me a menu. Nothing gets me anywhere. I could select another mission, but then that's it, I can't even get back to the list of missions.

Will kill the process now.