Config inspector module report about two issue:
system.rss:channel missing schema
system.rss:items.limit missing schema
Needs work
9.5
Used to track the progress of issues reviewed by the Drupal Needs Review Queue Initiative.
Not all content is available!
It's likely this issue predates Contrib.social: some issue and comment data are missing.
This issue is being reviewed by the kind folks in Slack, #needs-review-queue-initiative. We are working to keep the size of Needs Review queue [2700+ issues] to around 400 (1 month or less), following Review a patch or merge request → as a guide.
With a new schema we will need an upgrade path to go forward.