A ChatGPT 403 after an update is usually caused by stale cookies, a broken session token, an extension conflict, or a network/security filter triggered by the new version. Use the fixes below to restore access fast.
If ChatGPT works on mobile data but fails on Wi‑Fi after an Android update, the cause is usually a broken Wi‑Fi profile, Private DNS conflict, VPN/filter app, or corrupted app data. Follow the fixes below in order to restore ChatGPT on Wi‑Fi fast.
If ChatGPT stopped working after an update, the fastest fix is clearing ChatGPT/OpenAI site or app data (cookies, local storage, app storage) and removing update-triggered conflicts (extensions, VPN/DNS filters, WebView/Chrome mismatch, or stale tokens). This guide gives exact steps for web, iOS, Android, and API errors.