"Unknown variable $1"

It's not clear to which message you are linking to. Please use the "link to this message" from the dropdown from the message name.

If you mean the one outdated message in Korean, please check the definition again. It's not the same what you linked.

Nike (talk)07:57, 9 April 2018

I've just discovered that there is difference between MediaWiki:Apihelp-query+imageinfo-param-prop and MediaWiki:Apihelp-query+imageinfo-param-prop/en. I had to translate the former one probably because I was taking the outdated English message.

Ykhwong (talk)08:07, 9 April 2018