In order to use my existing Nikon lenses for new camera canon EOS RP I purchased Fikaz lens adapter Nik(G)-EOS R. Mechanical installation of adapter passed smoothly. But Shutter button not operated with any lens. Other words as soon I install adapter Shutter button stop operates? Any attempts to resolve the problem by menu adjusting are not succeed. For any advice/comments will be very appreciated.
Well considering this is just a cheap piece of metal you to mount the lens, you will need to search custom functions for a shutter release without lens option, the mount has no way to communicate with the lens and even if the adapter had the circuits nikon and canon wouldn't talk to each other. So you need to have the shutter release with no lens option on, because effectively that is what is going on as far as the camera is concerned.
In menu not available any option regarding "shutter release without lens". May be there is some code to open additional hidden menu ?
Did you happen to read your useer manual section on custom functions like i referenced? Took me 30 seconds to find it on canon.com this is page 544 i believe of your RP manual.