iMovie export fail

Hello everyone,

I have my movie ready to export, but when I choose the Share option, nothing happens. I tried exporting to file and directly to YouTube, in both the quick share menu and the File > Share menu, and literally nothing happens when I click. This is a work-related project, so it's important I get it out soon.

I also tried duplicating the file and exporting the new one, and creating an entirely new, short video to test. Still didn't work.

Please help!