The type SP.PropertyValues does not support HTTP PATCH method
What causes it and how to fix it:
- A library with NoCrawl returns nothing from Search — and silently blinds anything built on SearchExcluded containers return 0 with HTTP 200 and no log, so Search-backed AI never sees them; provisioning that excludes data lists must not inherit that onto content libraries; reindex can't be forced over REST (SP.PropertyValues won't MERGE); indexing is not a permission change — Search trims per user; and Hidden is a separate axis from NoCrawl, so hiding a library does not take it out of the index (measured before/after)Cause and fix →