Add blocked-account troubleshooting to personal Copilot plan setup (#61544)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: bot-digital-customer-success <121182491+bot-digital-customer-success@users.noreply.github.com>
Co-authored-by: Daniel Klemm <pickhub@github.com>
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 7b0e4afa-aa57-4157-aad3-b96001f1197c
Copilot-Session: eded509d-cdff-4aa6-b46e-519d3cd9c7d7
Copilot-Session: 8f3ea0a2-c8f2-48c3-a221-a1505842061b

Author: 4 people

content/copilot/how-tos/manage-your-account/get-started-with-a-copilot-plan.md

@@ -22,11 +22,12 @@ category:
   - Configure Copilot
 ---
 
-You can get started with your {% data variables.product.prodname_copilot_short %} plan by:
+This article covers:
 
 * [Accessing {% data variables.copilot.copilot_free_short %}](#accessing-copilot-free)
 * [Upgrading from {% data variables.copilot.copilot_free_short %}](#upgrading-from-copilot-free)
 * [Subscribing to {% data variables.copilot.copilot_pro_short %}, {% data variables.copilot.copilot_pro_plus_short %}, or {% data variables.copilot.copilot_max_short %}](#subscribing-to-copilot-pro-copilot-pro-or-copilot-max)
+* [Troubleshooting](#troubleshooting)
 
 ## Accessing {% data variables.copilot.copilot_free_short %}
 
@@ -110,3 +111,16 @@ If the plan does not appear after following the checkout steps [when subscribing
 1. Confirm that the plan appears in your {% data variables.product.prodname_copilot %} settings or in your personal account settings under **Billing & licensing**. For more information, see [AUTOTITLE](/copilot/how-tos/manage-your-account/view-and-change-your-copilot-plan).
 1. If payment method verification failed or you did not complete the activation step, retry the checkout flow.
 1. If you completed activation and the plan still does not appear, contact {% data variables.contact.contact_support_page %}.
+
+### Blocked plan setup on a personal account
+
+Your personal account may have a {% data variables.product.prodname_copilot_short %} access restriction if you see:
+
+* "It appears you are not eligible to sign up for {% data variables.copilot.copilot_free %}"
+* "Your account is unable to sign up for {% data variables.product.prodname_copilot_short %}. Please contact Support"
+* An upgrade that does not complete
+* Editor errors that tell you to contact support, or that mention a 403 token error
+
+First check the relevant guidance: [Accessing {% data variables.copilot.copilot_free_short %}](#accessing-copilot-free) for eligibility issues, or [Account still shows {% data variables.copilot.copilot_free_short %} after checkout](#account-still-shows-copilot-free-after-checkout) for paid upgrades. If those cases do not apply, these messages can indicate an account restriction rather than normal eligibility, checkout, or usage-limit issues.
+
+If your account has a {% data variables.product.prodname_copilot_short %} access restriction, contact {% data variables.contact.contact_support_page %} and request an account review. You cannot remove the restriction yourself.