If the SVG file is of a size larger than $wgSVGMetadataCutoff (256KB) then fetching the nominal image dimensions fails. The SVG is still served to the browser, but hidden due to max-width being set to 0px
If the SVG file is of a size larger than $wgSVGMetadataCutoff (256KB) then fetching the nominal image dimensions fails. The SVG is still served to the browser, but hidden due to max-width being set to 0px
Github issue here: https://github.com/mgeb/mediawiki-drawio-editor/issues/22