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I’ve seen a 2 year old post describing the error message below. I am receiving the exact same error message now.
EMAIL DELIVERY ERROR: the plugin WP Mail SMTP v2.1.1 logged this error during the last time it tried to send an email:
There was a problem while retrieving Auth for gmail: Could not json decode the token
Please review your WP Mail SMTP settings in plugin admin area. Consider running an email test after fixing it.
I’ve cleared the cache but the error message is still there. I’ve tested my contact form and it successfully sent an email. So is the error message just an irritant rather than an indication of a problem? I can’t afford to be in doubt as any failed emails could mean a loss of business. Anyone able to help?