Capsule sync task fails with error 'You don't have permission to access /pulp/api/v3/contentguards/certguard/rhsm/' after upgrading to Red Hat Satellite\Capsule 6.10

Issue

• After upgrading the Red Hat Satellite and Capsule versions to 6.10, when trying to synchronize the capsule, It fails with the following error.

  PulpCertguardClient::ApiError: Error message: the server returns an error
  HTTP status code: 403
  Response headers: {"Date"=>"Wed, 05 Jan 2022 21:23:06 GMT", "Server"=>"Apache", "Content-Length"=>"280", "Content-Type"=>"text/html; charset=iso-8859-1"}
  ...
   403 Forbidden
  ...
  You don't have permission to access /pulp/api/v3/contentguards/certguard/rhsm/0146519c-414c-4390-ad81-906234573cdf/
  on this server
  ....
  

• The sync attempt fails almost immediately after initiating it.