I had been running bitcoin core qt for a few months fine and then on rebooting my mac and opening the application the following prompt popped up

Error: Cannot parse configuration file: specified data directory ""/Users/username/Library/Application Support/Bitcoin/"" does not exist..

I'm a long way from being technically competent but i'm 99% sure the data directory does exist.

Any advice on what else this could be? or what i'm doing wrong?

thanks.

peace