There was a problem while sending the test email.

Replies: 0

Versions:
WordPress: 5.3.2
WordPress MS: No
PHP: 7.4.0
WP Mail SMTP: 1.8.1

Params:
Mailer: gmail
Constants: No
Client ID/Secret: Yes
Auth Code: Yes
Access Token: Yes

Server:
OpenSSL: OpenSSL 1.0.2k 26 Jan 2017
PHP.allow_url_fopen: Yes
PHP.stream_socket_client(): Yes
PHP.fsockopen(): Yes
PHP.curl_version(): 7.62.0
Apache.mod_security: No