The redirect URI in the request, https://garden.psdr3.org/?option=com_slogin&task=check&plugin=google, does not match the ones authorized for the OAuth client. To update the authorized redirect URIs, visit: https://console.developers.google.com/apis/credentials/oauthclient/1055440080077-7hrhi61qg6nbat7t3tt4i0i2bqgnr369.apps.googleusercontent.com?project=1055440080077