Welcome to the forum.
First tip would be to change your username from being an
email address, unless you want various offers! You will need to
create a new name to do that.
Is your project on a network drive (other than through some
form of version control)?
If not, see the topic on my site about opening a project.
Maybe it is time to trash the CPD file. Take a copy of your project
as it is now before you start.
Help others by clicking Correct Answer if the question is answered. Found the answer elsewhere? Share it here. "Upvote" is for useful posts.