It is supposed to work in Org Store. We'll publish a blog post once it's released with a good feature definition.
Deprecation message is shown if there's no internet connection to PBI CDN.
Can you visit this link and share if it returns anything? https://visuals.azureedge.net/prod/approvedResources.json
Another idea is to clear Power BI Desktop cache by removing evrything at these folders:
C:\Users\%username%\AppData\Local\Microsoft\Power BI Desktop
C:\Users\%username%\Microsoft\Power BI Desktop Store App
C:\Users\%username%\AppData\Local\Microsoft\Power BI Desktop SSRS
Microsoft Power BI Custom Visuals