Curious. No, I don’t generally work in a private window.
Might there be some type of privacy protection setting in the browser(s)?
UPDATE: Indeed there was:
Under Preferences > Privacy & Security > Tracking Protection
->When this was switched from “Always” to “Only in Private Windows” the feed showed.
Ultimately, this setting is one many savvy users would probably have selected. So am I to understand that users who wish to block online trackers would be unable to see a twitter (or a facebook) feed with this plugin?
Is that standard?