On October 19, 2021, we have enabled single-sign-on for our Plesk Support Center to provide a seamless login/account experience. This implies that you’ll be able to use a single account across any of our web-facing properties.
If you had already registered your account at MyPlesk.com/Plesk360/Platform360 please use one for login. Otherwise please re-register it using the same email address as your existing Zendesk login (support account). It’s essential that you use the same email address on our support center to ensure that your tickets stay attached to the same account.

Unable to install Let's Encrypt certificate for domain in Plesk: Could not obtain directory: cURL error 77




  • Avatar
    Jeroen Meeuwissen

    I get the same problem, and if I go to http://acme-v01.api.letsencrypt.org/ it does not yield a valid response. If I go to https://acme-v01.api.letsencrypt.org/ however, it does give me a valid response. Could it be that curl does not connect via https?

    Comment actions Permalink
  • Avatar
    Ivan Postnikov

    Hello @Jeroen, 

    > Could it be that curl does not connect via https?

    curl is capable of doing this.

    Please, could you try this article.


    Comment actions Permalink
  • Avatar
    Jos Fabre

    The 77 error indicates that plesk cannot read a certificate file. 

    Plesk also indicates that a certificate was installed.

    This implies that the request was valid and there was an error saving the files. 

    Perhaps a file rights thing. However, this is a brand new vps with plesk and latest updates...

    Any resolutions yet?


    Problem with reading the SSL CA cert (path? access rights?)
    source: https://curl.haxx.se/libcurl/c/libcurl-errors.html

    Comment actions Permalink
  • Avatar
    Artyom Volov

    Hello @Jos,

    Could you provide a little more details regarding the issue - the error is shown when you are trying to secure a domain with Let's Encrypt?  http://acme-v01.api.letsencrypt.org/ is available for you? Have you tried updating curl package by using instructions from the article?

    Comment actions Permalink

Please sign in to leave a comment.

Have more questions? Submit a request