The Minecraft Wiki is no longer considered as official by Microsoft and therefore several changes are required to be made, including to the wiki's logo. Please read this announcement for more information.
Must be a plain text. Can include spaces as well as target selectors. The game replaces entity selectors in the message with the list of selected entities' names, which is formatted as "name1 and name2" for two entities, or "name1, name2, ... and namen" for n entities. In Bedrock Edition, @here can be used to mention all players.
the arguments are not specified correctly
<targets> or player: target fails to resolve to one or more online players