Gmailer WP MailSMTP Error

Replies: 0

We are receiving the following error on our website when sending out email through WP SMTP.

Could not connect to host:

Here’s the full error:
Versions:
WordPress: 5.4.2
WordPress MS: No
PHP: 7.0.33
WP Mail SMTP: 2.4.0
Params:
Mailer: gmail
Constants: No
Client ID/Secret: Yes
Auth Code: Yes
Access Token: Yes
Server:
OpenSSL: OpenSSL 1.1.1h 22 Sep 2020
PHP.allow_url_f No
PHP.stream_socket_client(): Yes
PHP.fsockopen(): Yes
PHP.curl_version(): 7.69.1
Debug:
Mailer: Gmail
cURL error 2: (see https://curl.haxx.se/libcurl/c/libcurl-errors.html)