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Clickin on Lead Capture tab i get this warning
You are not authorized to access this page. Please contact your salesforce.com administrator for more information or raise a support case at help.salesforce.com, providing the following identifier for further investigation: 57c64c75-4ba6-4c9d-974c-1e7d6f1e4bd5.
Are you using admin login or any user? If any user please check with the admin for access permissions
In my case i am an admin user with "permission sets" completed. But message is the same.