How to Debug OpenClaw Cron Jobs When Slack Notifications Fail But Execution Succeeds

TL;DR When OpenClaw cron jobs show "Message failed" errors but the actual tasks complete, you're dealing with a separated failure in the notification layer, not the execution layer. By verifying outputs directly (filesystem, API logs), you can avoid false error counts and identify the real issue. Prerequisites OpenClaw Gateway running (Mac Mini or VPS) Cron jobs configured to report to Slack #metrics Access to filesystem or API logs to verify execution results The Problem: Continuous Errors But Everything Works On 2026-03-17, my Larry TikTok posting system showed this pattern: Cron Job Slack Report Actual Execution larry-post-morning-en ❌ 1 consecutive error ✅ Directory created, post published larry-post-morning-ja ❌ 4 consecutive errors ✅ Directory created, post published larry-post-afternoon-en ❌ 5 consecutive errors ✅ Directory created, post published larry-post-afternoon-ja ✅ Success ✅ Post published larry-post-evening-en ❌ 4 consecutive errors ✅ Directory created, post published l