Cert renewal on Plesk not working

Hey Guys,

When we try and renew a certificate using the module on Plesk we keep getting the following error:

Could not obtain directory: cURL error 35: SSL peer reports incorrect Message Authentication Code. (see libcurl - Error Codes)

After a while, it does seem to renew but it keeps on happening, could this be an IP block at all?

Server IP is:

We have reached out to Plesk but they have been unable to assist on it as they can't see anything wrong

No. An IP block would block it always not just some time.

An intermittent curl 35 error sounds like a network problem. You could try running the below command repeatedly. This is the same HTTPS request that is failing in your error message.

curl https://acme-v02.api.letsencrypt.org/directory

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