I created a project in Premiere Elements 2019 using my Macbook Pro 2018.
Now I need to open the .prel file in Premiere Pro but premiere pro will not open it. I get a message the files can't be found, although there are all there.
Does the project file actually open, but the files are offline, or does it not open at all?
Can you post a screenshot?
Look in the Project Panel (and inside of folders in the project panel) to find a sequence and then couble click on it to open it.
Post screenshot of that message