The staging api changed too. I know people who did not update that url, it's not especially obvious because the old url doesn't contain v01.
ok ? Index: upgrade66.html =================================================================== RCS file: /data/cvs/www/faq/upgrade66.html,v retrieving revision 1.15 diff -u -p -r1.15 upgrade66.html --- upgrade66.html 30 Oct 2019 04:11:00 -0000 1.15 +++ upgrade66.html 8 Nov 2019 17:12:01 -0000 @@ -147,6 +147,14 @@ any post-release fixes. <pre class="cmdbox"> https://acme-v02.api.letsencrypt.org/directory<!-- --></pre> + The staging api url should also be changed from + <pre class="cmdbox"> + https://acme-staging.api.letsencrypt.org/directory<!-- + --></pre> + to + <pre class="cmdbox"> + https://acme-staging-v02.api.letsencrypt.org/directory<!-- + --></pre> <p> The <code>-A</code> and <code>-D</code> flags have been removed from <a href="https://man.openbsd.org/OpenBSD-6.6/acme-client.1">