400 Bad Request

im getting 400 Bad Request under under http requests it errors out after 15 seconds and it has made the whole site very slow (bear in mind i have a very large site with over 40k posts)

http request: POST
(Certificate verification disabled: sslverify=false)
https://accounts.google.com/o/oauth2/token

response: 400 Bad Request

transport: curl
Call Stack: WP_Http->post()
wp-includes/class-http.php:478
wp_remote_post()
wp-includes/http.php:187
Yoast_Google_WPIO->makeRequest()
wp-content/plugins/wordpress-seo/vendor/yoast/api-libs/google/io/Google_WPIO.php:95
Yoast_Google_OAuth2->refreshTokenRequest()
wp-content/plugins/wordpress-seo/vendor/yoast/api-libs/google/auth/Google_OAuth2.php:268
Yoast_Google_OAuth2->refreshToken()
wp-content/plugins/wordpress-seo/vendor/yoast/api-libs/google/auth/Google_OAuth2.php:246
Yoast_Google_Client->refreshToken()
wp-content/plugins/wordpress-seo/vendor/yoast/api-libs/google/Google_Client.php:297
Yoast_Api_Google_Client->refresh_tokens()
wp-content/plugins/wordpress-seo/vendor/yoast/api-libs/class-api-google-client.php:192
Yoast_Api_Google_Client->__construct()
wp-content/plugins/wordpress-seo/vendor/yoast/api-libs/class-api-google-client.php:47
WPSEO_GSC_Service->set_client()
wp-content/plugins/wordpress-seo/admin/google_search_console/class-gsc-service.php:159
WPSEO_GSC_Service->__construct()
wp-content/plugins/wordpress-seo/admin/google_search_console/class-gsc-service.php:29
WPSEO_Config_Component_Connect_Google_Search_Console->__construct()
wp-content/plugins/wordpress-seo/admin/config-ui/components/class-component-connect-google-search-console.php:22
WPSEO_Configuration_Components->__construct()
wp-content/plugins/wordpress-seo/admin/config-ui/class-configuration-components.php:21
WPSEO_Configuration_Service->set_default_providers()
wp-content/plugins/wordpress-seo/admin/config-ui/class-configuration-service.php:51
wpseo_init_rest_api()
wp-content/plugins/wordpress-seo/wp-seo-main.php:283
do_action(‘init’)
wp-includes/plugin.php:525