For some reason, when I tried to go on the Replace Text on Crappy Games, it gave me this error: "Error: text replacements cannot be run if $wgCompressRevisions is set to true." How am I supposed to replace text mistakes with the intended text if this error keeps showing?
First of all, please do be careful when using the task forms as this is not a security task in any way.
Second, unfortunately the error message says it all, compressed wikis (which we do when a wiki is large) do not work with ReplaceText. I'm sorry about this inconvenience, the only thing I can recommend instead is MassEditRegex.