Search for some words in customizations database throws a "mandatory parameters" error.

If I visit https://www.phpbb.com/customise/db/ and search for words like

_icon, style, color _

It comes back with

Some mandatory parameters are missing ("contrib_type", "contrib") to generate a URL for route "phpbb.titania.contrib".

but for search
emoji
it just gives
No suitable matches were found.

Weird, huh?