Anaconda Fails to open on my Macbook

Its really simple, I’ve installed the compatible version of anaconda (64-Bit Graphical Installer (688 MB) on my Macbook Air (maCOS High Sierra, version 10.13.6), BUT it won’t open, and my laptop gives no explanation (it just says: The Program Anaconda- Navigator can’t open, see attachment) . Could someone help me?

Kind Regards Nelson