Can you try this package installation on a fresh AEM DEV instance. This will tell us if the issue is with package or the AEM instance.

If that article with the video is not working - its most likely because you have not setup the System user properly. You need to follow the article exactly as it and make sure you get the system user created, give correct permissions and use the Sling Mapping Service. Once you do all of this - it wo...

As Arun states - there is no way to define a multifield property on DS OSGi.

Thanks for the update. Happy to hear you got this working.

I am glad to hear its working now.

Here is an older community article - that Praveen contributed - that talks about how to customize the side kick that may help point you in the correct direction -- Adobe Experience Manager Help | Customizing the Adobe Experience Manager Sidekick to improve the activate process

As praveen states - check permission on all nodes.

Please provide more details on your search implementation. What API are you using - QueryBuilder?  Can you provide the syntax you are using for the search. This way - the community can help you better.

Great response!

Nice response!