Plugin not working, conflict with other plugins in WordPress?

Hi! The plugin was running fine but something has happened and I suspect it has to do with Jetpack (recently updated with 6.0) or WordPress itself (recently updated to 4.9.5).

The plugin right now does nothing: the RSS feed showing for everybody is the partial one, not the full one. Even using the override key, the plugins seems to do nothing at all.

Has anyone notice the same? Hints, solutions?