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Symptom

When you try to create a Let’s Encrypt ssl certificate this error is displayed and a certificate is not created:

Invalid response from https://acme-v01.api.letsencrypt.org/acme/new-authz: Error creating new authz :: "" was considered an unsafe domain by a third-party API.
Type: urn:acme:error:unauthorized.

Cause

Google marks the website as malicious. It has found phishing or other malicious scripts on it. Websites that have been marked as malicious by Google cannot receive a Let’s Encrypt ssl certificate.

Solution

Remove the malicious content from your website. Let Google re-index your website. You might speed the process up by the help of Google Search Console of the Google Webmaster Tools. Once Google no longer marks your website as malicious you can create the Let’s Encrypt certificate.

Overview of frequently asked questions