Pokemon Champions cannot be added to LivingDex Box

Unable to add Pokémon. I the "+" symbol to add a new Pokémon obtained, but I am unable to input any Pokémon name to find the Pokémon. It only doesn't work on the Pokémon Champions Box. I am able to add Pokémon in other games, but not Pokémon Champions. I though of generating the box preset and just removing the ones that I do not have and cloning ones that I have duplicates of, but when I attempted to do so, the generate box preset doesn't overwrite my boxes.

Need some assistance on this issue.