That solved it.
Tried that. Doesn't work. Rather than mentioning security issues MacOS warns about the app being "damaged", therefore can't be opened.
Did you ever signed the app?
Can't open it on Mac. (MacOS Big Sur 11.7.3, MacBook Pro Retina 13-inch Late 2013, 2.8 Ghz Dual-Core Intel core i7, Intel Iris 1536 MB).
