WP SMTP Fails

Hello, I have set this up before lots of times, and followed the same steps as always, but email tests are failing and this is in the debug:

Versions:
WordPress: 4.9.9
WordPress MS: No
PHP: 7.2.13
WP Mail SMTP: 1.4.1

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

Server:
OpenSSL: OpenSSL 1.0.2g 1 Mar 2016
PHP.allow_url_fopen: Yes
PHP.stream_socket_client(): Yes
PHP.fsockopen(): Yes
PHP.curl_version(): 7.47.0

Debug:
Mailer: Gmail
{
“error”: {
“errors”: [
{
“domain”: “global”,
“reason”: “failedPrecondition”,
“message”: “Bad Request”
}
],
“code”: 400,
“message”: “Bad Request”
}
}

Any idea what could be causing?

Any help would be greatly appreciated.