Does MultimediaViewer log detailed error information anywhere? I am trying to debug a problem where MultimediaViewer can't display any images. It displays a black error screen,
"Sorry, the file cannot be displayed. There seems to be a technical issue. You can retry if it persists. Error: Unknown_operation."
When this error is displayed, the usual buttons for "Download this file" and "Share and embed this file" link to https://name-of-wiki.com/w/null.
When MultimediaViewer is disabled, images display perfectly as File:NameOfImage and Media:NameOfImage.
This is MediaWiki 1.35.0. Thanks for any insights.