Board Thread:Support Requests - Getting Technical/@comment-24798865-20181019170124/@comment-9605025-20181019214906

It isn't a mystery. RainbowBubbles3 rewrote the template for some odd reason (see here). In doing so, she/he changed from using MediaWiki markup tables to using HTML tables. He/she also changed the name of the template parameter. Because of that, template calls that still use the "list" parameter won't display any content. The reason you get the "1" in brackets is that, since "content" hasn't been provided a value, it uses the value of the first positional parameter (i.e. the named parameter "1"). However, that has not been provided a value either. Since no default value was specified, MediaWiki then interprets that to mean that the literal string " " should be used. As for the square brackets, are you sure those aren't just the borders of the div element?

You can see the template working on other pages where RainbowBubbles3 has made the necessary changes (see here). However, I don't quite understand why the changes to the template were needed in the first place. That is something you will probably want to discuss with her/him.