In client Office 2016 365 ProPlus, when I "Insert Icon", once I click on one in the gallery, and click insert. These are .SVG files. However, if I have an SVG file on my desktop, I can "Insert Picture" choose it, and it works fine.
Total error message:
An error occurred while importing this file.
Note: if I open a browser and enter https://hubblecontent.osi.office.net/ContentSVC/Content/Download?Provider=Microsofticon&fileName=Scanner.svg it works just fine.