This process is causing me problems, the VNC server login window that I GET has a username box that defaults to the Pi's user. In the example this is greyed out. If I use either the VNCserver password or the Pi's password I get 'cannot currently show the desktop' in the VNC viewer.
I appreciate that time has passed since this was written, I wonder if the process to get VNC working on a 64 bit pi 4 has changed, I used a 1/22 image file to create the OS. Any help?