Issue detected

I’m not receiving emails from the site and the test email isn’t working. Any suggestions much appreciated.

Here is the Error Log:

Versions:
WordPress: 5.3.2
WordPress MS: No
PHP: 5.6.40
WP Mail SMTP: 1.8.1

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

Server:
OpenSSL: OpenSSL 1.0.2q 20 Nov 2018
PHP.allow_url_fopen: Yes
PHP.stream_socket_client(): Yes
PHP.fsockopen(): Yes
PHP.curl_version(): 7.59.0

Debug:
Mailer: Gmail
{
“error”: “invalid_grant”,
“error_description”: “Bad Request”
}