Error message: Uncaught Google_Service_Exception:

Hello. I received the following in an automated error report from my WordPress site:

Since WordPress 5.2 there is a built-in feature that detects when a
plugin or theme causes a fatal error on your site, and notifies you
with this automated email.

In this case, WordPress caught an error with one of your plugins,
Instant Indexing.

First, visit your website and check for any
visible issues. Next, visit the page where the error was caught
(https://xxxxxxx/wp-admin/post.php) and check for any visible
issues.

Your Site is Experiencing a Technical Issue

Error message: Uncaught Google_Service_Exception: {
“error”: “invalid_grant”,
“error_description”: “Invalid JWT Signature.”

I am also seeing the following error in the RankMath Instant Indexing section:

11:48:06 PM update https://xxxxxxx/
{
“readyState”: 4,
“responseText”: “<p>There has been a critical error on your website.</p><p>Learn more about debugging in WordPress.</p>”,
“status”: 500,
“statusText”: “error”
}
——————————————————–

Thanks for your assistance.