Current configuration does not allow embedding of the file UbuntuUlwaskin.otp because of its mimetype application/vnd.oasis.opendocument.presentation-template.: UbuntuUlwaskin.otp
Attached FilesTo refer to attachments on a page, use attachment:filename, as shown below in the list of files. Do NOT use the URL of the [get] link, since this is subject to change and can break easily.
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