PostHog Common Errors Overview Diagnosis and solutions for the most common PostHog integration errors. Covers event capture failures, authentication issues, feature flag problems, identity fragmentation, and SDK initialization errors. Prerequisites - PostHog SDK installed ( or ) - Access to browser console or server logs - PostHog project API key ( ) available Instructions Error 1: Events Not Appearing in Dashboard Symptoms: calls execute without error but events never show in PostHog Activity tab. Diagnoses and fixes: Error 2: Feature Flag Returns or Wrong Value Error 3: 401 Unauthorized on…