Invalid certificate when adding ATTinyCore to Arduino 2.3.2

[bratoff]

After adding the .json link in Arduino preferences, at each subsequent start of the Arduino environment (version 2.3.2) the following error message appears:

"Some indexes could not be updated. Get "https://drazzy.com/package_drazzy.com_index.json": tls: failed to verify certificate: x509: certificate has expired or is not yet valid: : http://drazzy.com/package_drazzy.com_index.json"

[[Closing because this appears to be a known issue.]]