I personally never use Bundle files (if that's what you meant by "Once I bundled it, I saved it as project").
I have had issues with Bun files in the past.
Now on to trying to fix it, you can open it in safe mode by holding down SHIFT and opening the project.
You will be presented with a window to load plug ins / this will help you find an offender if it is a plug in causing it (possibly a high latency plug in) or a plug in that's just causing issues.
I typically make sure all my tracks are "Bounced to clips" so all tracks are 1 full track and not 10 little clips making up 1 track. try to get them to line up (this makes it easier to import to a new project).
Drag all the tracks at once to the Browser (create a sub directory where you know where it is).
you can also drag 1 at a time to give them a custom name if you so choose.
Now you can import them one by one by dragging them from that folder to a new project.
you might be able to save the current project as a project template. this way everything is all set for the new project. however it could be a corrupt project and saving a corrupt project as a template would be a big No for me.