YOUR NEXT STEP
Stop uploading contacts and review earlier uploads
Start here
Treat this as two checks: the setting for future uploads and the list of contacts already uploaded. An off switch alone is not evidence that an earlier list is empty. This guide covers your Facebook account in the mobile Facebook app. Messenger is a separate app to check if you use it; the Facebook menu below is not a Messenger walkthrough.
This helps you choose a next step. Look for the reason for a restriction in the Instagram or Facebook notice.