400 Bad Request

I am seeing the following error message in Query Monitor on /wp-admin/index.php :

Method: POST
URL: https://api.hubspot.com/wordpress/v1/oauth/refresh
?refresh_token=
Status: `400 Bad Request
HTTP API Transport: curl
DNS Resolution Time: 0.0709
Connection Time: 0.0723
Transfer Start Time (TTFB): 0.1340
Response Content Type: application/json;charset=utf-8
IP Address:`
Caller: `Leadin\client\HubSpot_Base_Api_Client->make_request()
wp-content/plugins/leadin/src/modules/client/class-hubspot-base-api-client.php:58
Leadin\client\Access_Token_Api_Client->refresh_access_token()
wp-content/plugins/leadin/src/modules/client/class-access-token-api-client.php:24
Leadin\auth\OAuth::refresh_access_token()
wp-content/plugins/leadin/src/auth/class-oauth.php:111
Leadin\auth\OAuth::get_access_token()
wp-content/plugins/leadin/src/auth/class-oauth.php:59
Leadin\client\HubSpot_Base_Api_Client->get_oauth_headers()
wp-content/plugins/leadin/src/modules/client/class-hubspot-base-api-client.php:28
Leadin\client\HubSpot_Base_Api_Client->authenticated_request()
wp-content/plugins/leadin/src/modules/client/class-hubspot-base-api-client.php:90
Leadin\a\c\Contacts_Api_Client->get_contacts_from_timestamp()
wp-content/plugins/leadin/src/admin/modules/client/class-contacts-api-client.php:45
Leadin\admin\ReviewController::has_contacts_created_since_activation()
wp-content/plugins/leadin/src/admin/class-reviewcontroller.php:31
Leadin\admin\NoticeManager->should_show_review_notice()
wp-content/plugins/leadin/src/admin/class-noticemanager.php:75
Leadin\admin\NoticeManager->leadin_action_required_notice()
wp-content/plugins/leadin/src/admin/class-noticemanager.php:52
do_action(‘admin_notices’)
wp-includes/plugin.php:517`
Component: Plugin: leadin

I am running version 9.2.12