Steps to reproduce

1. Go to demo and open Pages-app
2. Create a page and export it (by default, it is a yaml file)
3. Remove the page
4. Try to import the page
5. Check it fails with the message "An unsupported upload file type"

Expected results

The page can be imported

Actual results

The upload is aborted and the message "An unsupported upload file type" is displayed

Workaround

• comment out this line: import.yaml#6, (link into resources app)
• (or) export it as XML

Development notes

When removing the allowedMimeTypePattern restriction from the dialog we found the upload to detect the file as application/octet-stream