Very frequently a light blue message balloon for the Diagnostic Server pops up concerning a "Spotlight Cloud data transfer failed with status code 429 Too Many Requests and the response-body." Perhaps this pops up every 5 minutes.

SOLUTION:
Please contact Support if the error occurs chronically every few minutes. If the message pop-us on the rare occasion, please note it's a load balancing event on our back-end and it should auto-correct itself momentarily.
Error captured from logs:
ERROR [LucyServiceHttpClientCleanup(Job#9973407)] HttpClientWrapper - Request to https://ingest.spotlightessentials.com/ingest/api/v3/organizations/c9fd19a4-2fd3-42ff-8dbf-5e7553ef5d8e/connections/cddc7d1e-73ff-4bc9-9d1b-b1b552b554ef/packages/sqlserver_spotlight/procedures/diskspace/timestamp/20190405T150617,901Z failed : HTTP/1.1 429 {"ReturnCode":429,"Message":"Ingest V4 service responded from the uri https://mds-ingest-v4-spot-prod.spotlightcloud.io/ingest/api/v4/organizations/c9fd19a4-2fd3-42ff-8dbf-5e7553ef5d8e/connections/cddc7d1e-73ff-4bc9-9d1b-b1b552b554ef/packages/sqlserver_spotlight/procedures/diskspace/timestamp/2019-04-05T15:06:17.9010000Z with the status code 429 Too Many Requests and the response-body: "}