Judging from the error message, this looks like C2 doesn't have the needed rights to save the project.
Try to save to the user folder (usually C:\Users[Username]) or to the Desktop.
If that doesn't work, try to remove the ' in your file (=project) name.
Special characters some times screw up saving processes.
If that doesn't work either, you will need to upload your .capx.
(always do this, no matter what. It will help you get to a solution)
We will need to see whether it is your PC (or capx) and whether we can save it.