Storyboard PRO 6 Unable to read error

at first i use to save my project in my hard drive. I forgot to bring my hard drive with me, so i decided to save my project in my iMac. But when hitting save and/or open the file, it gives errors. Please help! Got a deadline! D:

Update: sooo after many attempts what i did was copy the project folder and paste it in the desktop. And it finally opened. But i still dont understand doesnt open or save correctly where i previously had the project file…?