Steps to replicate the issue (include links if applicable):
- Open any template for editing in the wikitext editor.
What happens?:
The following error is shown in the browser's console:
jQuery.Deferred exception: languageTag is null bcp47@ Dialog.js/Dialog.prototype.updateParamDetailsLanguage@ Dialog.js/Dialog.prototype.createParamDetails@ Dialog.js/Dialog.prototype.initialize@ OO.ui.Window.prototype.setManager@
What should have happened instead?:
The button for opening the TemplateData dialog should be shown above the editing form.
Software version (skip for WMF-hosted wikis like Wikipedia):
- MediaWiki c1599c91b3f70c16524fbc44ede2d6c39da82900
- TemplateData f302f65dbb215a8cae65a2904a21a312989f0545
Other information (browser name/version, screenshots, etc.):
- Browser: Firefox 117