Image Upload not working

[PAmari121]

Upgraded to DNN Platform 9.9.1. Upgraded News Articles to the latest version, 12.0, and found one issue.

Browser "Console" showed a looping error:

The resource from “https://journalstaging.dnn4less.com/jcopdf/articleType/dnn.controls.dnntoolbar.js” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).
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downloadable font: kern: Too large subtable (font-family: "pb_semibold" style:normal weight:400 stretch:100 src index:0) source: https://journalstaging.dnn4less.com/DesktopModules/admin/Dnn.PersonaBar/css/open-sans.semibold.ttf
downloadable font: Table discarded (font-family: "pb_semibold" style:normal weight:400 stretch:100 src index:0) source: https://journalstaging.dnn4less.com/DesktopModules/admin/Dnn.PersonaBar/css/open-sans.semibold.ttf
The resource from “https://journalstaging.dnn4less.com/jcopdf/articleType/dnn.controls.dnntoolbar.js” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).

Went to web.config and removed:

<add name="X-Content-Type-Options" value="nosniff" />

After removing that, News Articles worked perfectly, image upload was fine, and there were no more errors.

Would rather not keep that removed for security reasons, so curious to see what is causing it.

Thanks
Pete