[SSL] Update troubleshooting.mdx (#21811)

* [SSL] Update troubleshooting.mdx

* Move full API Access error to body and add solution details

* Slight text adjustments to refresh error

---------

Co-authored-by: Rebecca Tamachiro <[email protected]>

Author: ngayerie

src/content/docs/ssl/origin-configuration/origin-ca/troubleshooting.mdx

@@ -42,4 +42,27 @@ Apache cPanel requires that you upload the Cloudflare origin CA root certificate
 ### Solution
 Use the following link to download an RSA version of the root certificate and upload it to your origin web server:
 
-* [Cloudflare Origin RSA PEM](/ssl/static/origin_ca_rsa_root.pem)
+* [Cloudflare Origin RSA PEM](/ssl/static/origin_ca_rsa_root.pem)
+
+## This zone is either not part of your account, or you do not have access to it
+
+When trying to generate an Origin CA on the dashboard, you find the error `Failed to validate requested hostname <hostname>: This zone is either not part of your account, or you do not have access to it`.
+
+### Cause
+This is a known issue where, whilst being created on the Cloudflare dashboard, Origin CA requires API access for the user creating the origin certificate.
+If the user does not have **API Access**, this error is returned.
+
+### Solution
+Make sure that the user creating the certificate has access to the API. You can check under **Account Home** > **Manage Account** > **Members**:
+
+- The default setting for the account is specified in the card **Enable API Access**.
+- Specific user API Access (which can override the default setting) is presented after selecting the user in the list of members.
+
+## Origin Server page displays origin certificates for another zone in the account
+
+### Cause
+This is a known issue where, when the Origin Server page is opened for different zones in sequence, it displays the certificates from the first zone.
+
+### Solution
+Refresh the page in your browser to get the correct origin certificates list for current zone.
+