We have created a simple Content Add-in (using office js api) that can be inserted in both Desktop and Online (browser) versions of PowerPoint.
The Desktop and Online versions share the same manifest. They have no difference in functionality and none have any special requirements defined in the manifest.
As they share the same manifest, they obviously share the same plugin id.
Never the less, add-in content inserted in web version version is not recognized when viewd in the desktop version. The error:
This add-in could not be started
And add-in content inserted in desktop version is not recognized when viewed in the web version. The error:
This add-in is not available in Office Online. Open this document in desktop version of Office to use the add-in.
Is this only because we use sideloading, or do we do something wrong?