Social platforms expire access tokens regularly (roughly every 6 months, or immediately after a password change, security checkup, or permission revocation on the platform). When that happens the account shows as token expired or disconnected in Social → Accounts, and scheduled posts to it start failing.
To fix:
- Go to Social → Accounts,
- Click Reconnect on the affected account and complete the platform login,
- Check the status shows connected again.
Your posting schedule, calendar, and drafts are untouched by a reconnect, publishing simply resumes. Posts that failed while disconnected can be rescheduled from the calendar.
If reconnecting keeps failing (especially Facebook/Instagram), log in to the platform directly first and complete any pending security prompts, then retry. Still failing? Message us in chat with the platform and brand name.