My god, everything’s come to a crashing halt: expired gmail token

Replies: 0

I’m getting this error:

https://www.dropbox.com/s/drugqgdbr18ks69/Screenshot%202020-07-17%2013.43.24.png?dl=0

EMAIL DELIVERY ERROR: the plugin WP Mail SMTP v1.8.1 logged this error during the last time it tried to send an email:

Mailer: Gmail
{
"error": "invalid_grant",
"error_description": "Token has been expired or revoked."
}
Consider running an email test after fixing it.

As far as I can tell, it stopped working in the past 24 hours. I haven’t changed gmail’s password or made any other changes.

I don’t know what to do! No clue! Clueless!