I am new in this api which is MediaWiki web service API. I am trying to pull data in above table of this url: https://lessonslearned.em.se.com/lessons/Main_Page

I'm testing it using its sandbox: https://lessonslearned.em.se.com/lessons/Special:ApiSandbox

Now, I can view the source of the page for example:

{{#ask:[[Category:Lesson]][[Has region::NAM]][[Creation date::>{{#time: r | -1 year}}]]|format=count}}

Above code should return lessons from NAM 12 months ago which has a value of 1 based on the table. But I am getting an error in this part [[Creation date::>{{#time: r | -1 year}}]].

Error message:{ "error": { "query": [ "\"Thu, 31 Mar 2022 03:50:49 +0000 -1 03202233103\" contains an extrinsic dash or other characters that are invalid for a date interpretation." ] } }

I tried to break the code in each part and found out that the root cause is the hyphen(-) in -1 year. I also check the documentation of the time parser function(https://www.mediawiki.org/wiki/Help:Extension:ParserFunctions##time) and they have samples similar to this, But in my case it is not working.

Hope someone can give me at least reference for this problem. Thanks!