Use this page to set or fix the Google Client ID when you can't sign in to the settings page.
Add this exact URL to Google Cloud Console → your OAuth 2.0 Client ID (Web application) → Authorized JavaScript origins (click + ADD URI for each):
After enabling HTTPS, you must add https://helpdesk.kingsburyhigh.org.uk here. Keep any older http://… origins only if staff still use them. Changes can take a few minutes — hard-refresh (Ctrl+F5) after saving.
Error origin_mismatch means the page URL is missing from this list.
Create an OAuth 2.0 Client ID of type Web application in Google Cloud Console. Paste it below:
