Are you using the latest release version?
Yes, 1.9.0.
Can you reproduce it?
Yes.
Does it happen for a new document? If not do you have a document you can share that shows the problem? Yes.
If you cannot provide a sample document then please give an accurate description of the problem for example it should include most of the following:
What is your operating system and version (Windows 10, OSX Mojave, iOS 12 etc)? MacOS High Sierra version 10.13.6.
What happened for you (and what you expected to happen)
If I open a new jpeg and do not make any edits to it then I am able to export it as a jpeg. If I open a new jpeg and then make edits to it then I am NOT able to export it. I have tried exporting as both a jpeg and as a pdf (both in high and low quality). I have tried exporting both to my desktop and an individual file. Once I start the export, it just stays in "exporting" status but makes no progress.