I worked as an apartment maintenance man for a couple of years. I found that happening frequently. My solution that worked very well, was to take apiece of wood, 2x4, I used, and hold it to the frame part that sticks. Take a hammer and strike the 2x4 hard. Just keep checking and hitting until the door clears. This will spread the opening so the door will swing freely. It may also spread the trim a little. I usually used a little caulk to hide the resulting gap.