500 (Internal Server Error)

Right now I am facing below issue, Can you check it.

PHP Fatal error: Uncaught Google_AuthException: Error refreshing the OAuth2 token, message: ‘{\n “error”: “invalid_grant”,\n “error_description”: “Bad Request”\n}’ in /wp-content/plugins/google-analyticator/google-api-php-client/src/auth/Google_OAuth2.php:288\nStack trace:\n#0 /wp-content/plugins/google-analyticator/google-api-php-client/src/auth/Google_OAuth2.php(247): Google_OAuth2->refreshTokenRequest(Array)\n#1 /wp-content/plugins/google-analyticator/google-api-php-client/src/auth/Google_OAuth2.php(225): Google_OAuth2->refreshToken(‘1/NmzDyRr_wDhOf…’)\n#2 /wp-content/plugins/google-analyticator/google-api-php-client/src/service/Google_ServiceResource.php(167): Google_OAuth2->sign(Object(Google_HttpRequest))\n#3 /wp-content/plugins/google-analyticator/google-api-php-client/src/contrib/Google_AnalyticsService.php(1010): Google_ServiceResource->__call(‘list’, Array)\n#4 in /wp-content/plugins/google-analyticator/google-api-php-client/src/auth/Google_OAuth2.php on line 288,