Can't set ⌘⌥\ as shortcut for "Show Quick Access" in 1Password 8 (changes automatically to ⌘C)

Hello, I just upgraded from 1Password 7 to 8 on my Mac. In 1Password 7, I always used ⌘⌥\ (command + option + ) to open 1Password Mini. I am trying to set the same keyboard shortcut in 1Password 8, b...