I tried creating a new set of API keys in console, only to receive these errors:
An error ocurred: Error refreshing the OAuth2 token, message:
{ "error" : "unauthorized_client" }
'An error ocurred: Error refreshing the OAuth2 token, message:
'{ "error" : "unauthorized_client" }'
Update: Errors from index.php from the php sdk example
Fatal error: Uncaught exception 'Google_AuthException' with message 'Error refreshing the OAuth2 token, message: '{ "error" : "unauthorized_client" }'' in google-api-php-client/src/auth/Google_OAuth2.php:280 Stack trace: #0 google-api-php-client/src/auth/Google_OAuth2.php(240): Google_OAuth2->refreshTokenRequest(Array) #1 google-api-php-client/src/auth/Google_OAuth2.php(217): Google_OAuth2->refreshToken('1/oS0qw-8UsYeFo...') #2 google-api-php-client/src/service/Google_ServiceResource.php(167): Google_OAuth2->sign(Object(Google_HttpRequest)) #3 google-api-php-client/src/contrib/Google_MirrorService.php(434): Google_ServiceResource->__call('list', Array) #4 index-demo.php(140): google_TimelineServiceResource->listTimeline(Array) #5 {main} thrown in google-api-php-client/src/auth/Google_OAuth2.php on line 280