Google+ login and WPMailSMTP

I get the following error if I use Google+ with Social login and Gmail with WPMailSMTP.

I don’t have this problem if I use Facebook or LinkedIn login and Gmail with WPMailSMTP.
No problem either if I use Google+ login and another SMTP mailer with WPMailSMTP.

Fatal error: Uncaught Google_Auth_Exception: Could not json decode the token in /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/super-socializer/library/Google/Auth/OAuth2.php:180 Stack trace: #0 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/super-socializer/library/Google/Client.php(189): Google_Auth_OAuth2->setAccessToken(NULL) #1 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/wp-mail-smtp/src/Providers/Gmail/Auth.php(121): Google_Client->setAccessToken(Array) #2 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/wp-mail-smtp/src/Providers/Gmail/Auth.php(53): WPMailSMTP\Providers\Gmail\Auth->get_client() #3 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/wp-mail-smtp/src/Providers/Gmail/Mailer.php(79): WPMailSMTP\Providers\Gmail\Auth->__construct() #4 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/wp-mail-smtp/src/MailCatcher.php(80): WPMailSMTP\Providers\Gmail\Mailer->send() #5 /opt/bitnami/apps/wordpress/htdocs/wp-includes/pluggable.php(481): WPMailSMTP\MailCatcher->send() #6 /opt/ in /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/super-socializer/library/Google/Auth/OAuth2.php on line 180