I have the same problem, if I use one of the HPKP generators (or copy-paste a &#x27;correct&#x27; example &amp; substitute my cert hashes) I always get the SSL Labs error. Everything else is perfect. Depending on what guide I follow, I get Nginx errors, SSL Labs errors, or other third-party test errors. Never a consensus, which is what I would expect once everything is 100% correct.<p>I&#x27;ll have to set aside a few more hours to figure this out soon. Even good documentation like this is not working for me: <a href="https:&#x2F;&#x2F;developer.mozilla.org&#x2F;en-US&#x2F;docs&#x2F;Web&#x2F;Security&#x2F;Public_Key_Pinning" rel="nofollow">https:&#x2F;&#x2F;developer.mozilla.org&#x2F;en-US&#x2F;docs&#x2F;Web&#x2F;Security&#x2F;Public...</a>