I was working on a userpath and after the check i found few variables and responses became null. So i restarted the application and then found the entire project is missing.
If the project is still in your source folder please follow the following:
(If not i can't say how the entire project got deleted without anyone deleting it)
Somehow project might have gotten corrupted. Please go to the project source folder and rename config.zip to any other name. You will also see .bak files which basically are backup files for your project saved at different times. Please rename any of those .bak files to config.zip. Hopefully this might help you get your project back.