-2130575251, Microsoft.SharePoint.SPException
What causes it and how to fix it:
- X-RequestDigest expires ~30 min after page load — but adding it by hand in SPFx makes things worseWrites 403 "security validation is invalid" on a long-open page; raw fetch needs a fresh digest from /_api/contextinfo, but in SPFx a hand-set header switches SPHttpClient's own digest and 403-recovery OFFCause and fix →