File warning opening PPTX files

[alex]

This is documented in the FAQ here:

PowerPoint media items show a "Navigation Cancelled" error when running on the Windows Player / PowerPoint brings up an Open Dialog

In general, we recommend converting all PowerPoint items to videos (from Office 2010 onwards you can simply Save As -> WMV Video and from Office 2013 onwards you can save directly to MP4 video) which allows playback across all Xibo clients. PowerPoint support is kept in the Windows client at present for legacy content and may be removed in a later release. Sometimes Windows Updates or Office Updates from Microsoft can change the default behaviour when we ask Internet Explorer to render a PowerP…

It’s also documented in the PowerPoint section of the manual.