Page Template:TemplateDataInfo/styles.css has no content.

<templatedata>JSON</templatedata> ./.

ERROR: This page is using an unprefixed version of template {{Tl}}

Use {{Wp/na/Tl}} instead and replace all occurences of {{Tl}} in Wp/na/ prefixed pages by that.
You may like to check 4 templates in Category:Wp/na/Templates using unprefixed template Tl first to remove all occurences from those templates which will fix the pages containing those templates too.