Have Extensions stopped working?

Extensions seem to have stopped working on my installations (phone, streaming boxes). Anyone else? Suggestions?

Welcome! Was this after updating SeriesGuide? What extensions? If from third party developers, did you ask them?

Yes. After the update NONE of the extensions appear.
I know now not to bug you about third party stuff, but when I saw YouTube was absent too I figured you would be curious. Keep well. Still the app that saved my lockdown.

OK, so the built-in extensions (e.g. web search) are affected as well. Could you share which version of SeriesGuide you are using, and on which devices this issue appears?

Note that it is known that extensions do not work on newer Fire TV versions, likely due to some new restrictions the Amazon devs have introduced.