A number of SVGs were uploaded through the Page Builder modal and are now causing errors in the Media Library preventing them from being deleted. In the Media Library the thumbnail is loading correctly but when I click Details the page it brings me to is blank.
Thank you for reporting the issue.
The Page Builder team has been working on fixing the SVG upload and the fix should be available in the coming days. I'll post a message here when it's available.
Until then, the workaround would be to switch to the Legacy Editor and upload/select the image from there and save the document. Then you could use the new Editor to edit other fields. @michael.nguyen, when you tried this, did you select the SVG uploaded from the legacy Builder? It should be the one showing dimensions {width} x {height} px.