Hey DJRD4465 -
Thank you for your report. Let’s see if we can first and foremost get you back into your project. In Windows Explorer, open your project directory. You should see several subfolders (Config, Content, Intermediate, etc.). Try deleting every sub folder EXCEPT Config, Content and Source if you are working in a C++ project. Afterwards open the engine up again and try to open the project.
If this does not clear up the problem then it may be a particular asset which has been corrupted. For this it would be helpful to take a moment and recall the last few things you edited or added in the level (mesh, Materials, etc.). Starting with the very last item go into your Content subfolder and remove the *.uasset file from the directory. (Try moving it temporarily to you desktop.) Once it has been removed from the Content Folder try to open the Project again. If you do find a particular *.uasset that when removed allows your project to open please zip this file up and post here for further testing.
Thank You and Let me know if you still cannot get into your engine. In the meantime we will try to track down the crash via the log files.
Eric Ketchum