Reported by SWinxy on Discord

Steps to replicate the issue (include links if applicable):

• Log into an account on enwiki
• Special:Preferences -> Gadgets -> turn on "XTools" gadget -> save
• Special:RandomPage (example page: https://en.wikipedia.org/wiki/StarRay)

What happens?:

• XTools ArticleInfo doesn't load. Displays a blinking dot to indicate that it is trying to load, but is never replaced with the ArticleInfo
• Console contains 2 identical CORS errors: Access to XMLHttpRequest at 'https://xtools.wmflabs.org/api/page/articleinfo/en.wikipedia.org/StarRay?format=html&uselang=en' from origin 'https://en.wikipedia.org' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

What should have happened instead?:

• XTools ArticleInfo should be displayed in the article's header

Software version (skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

• https://xtools.wmflabs.org/api/page/articleinfo/en.wikipedia.org/StarRay?format=html&uselang=en seems to work fine if you copy paste that into browser and visit the page, so API is up and running