Dear all, today, we removed the PNG image fallback for Math rendering in LTS release 1_39 https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Math/+/898882 By default, math images are fetched from Wikimedia's Restbase instance. https://wikimedia.org/api/rest_v1/ However, this instance will stop providing PNG images shortly. Therefore, we recommend updating the Math extension if you expect that your users have chosen to render formulae in PNG instead of SVG images. According to https://caniuse.com/svg 99.11% of all users should now be able to render SVG images. If you render your math images locally https://www.mediawiki.org/wiki/Extension:Math#Mathoid's_CLI_interface you can upgrade whenever you update your local mathoid instance to a node version > 10. The current mathoid release (0.7.6) still supports PNG output when configured. Please follow https://phabricator.wikimedia.org/T311620 for more details on the mathoid update procedure. All the best physikerwelt On Tue, Nov 22, 2022 at 9:33 PM Physikerwelt <wiki(a)physikerwelt.de> wrote: