Common Visualforce JavaScript Remoting API Validation Errors

These error messages apply to Apex controller validation:

• The concrete implementation “CLASS” in namespace “NAMESPACE” for Apex interface “METHOD_PARAMETER” doesn't have permission to be used. The Apex object can't be instantiated.
  • The deserialized object doesn't have permission to be used in the associated namespace. Review the Apex class to remove incompatible annotations or fulfill missing security requirements that must be satisfied.
• The concrete implementation “CLASS” in namespace “NAMESPACE” doesn't implement the Apex interface “METHOD_PARAMETER.” The Apex object can't be instantiated.
  • Ensure that the data type of the deserialized Apex object is the same as the input argument type expected by the Apex controller method.

These error messages apply to CSRF token validation:

• Remoting request had invalid authorization. Try again later.
  • Check if the CSRF token was issued successfully. Request another token if needed.
• Remoting request authorization expired. Refresh the page and try again.
  • The CSRF token is expired. Request another token, and use the new token for the request.
• Remoting request could not be authorized. Refresh the page and try again.
  • An unexpected failure occurred during CSRF token validation. Review the console log and the server log to identify the point of failure and determine how to correct the issue.
• Remoting request authorization invalid for requested method.
  • Confirm that the CSRF token is valid. Then ensure that the CSRF token is being used for the same method that it was issued to validate.
• You do not have the level of access necessary to perform the operation you requested. Please contact the owner of the record or your administrator if access is necessary.
  • Access by token or authorization is unsuccessful, but there isn't any information about why the authorization failed. Check the console log and server log for information about how to correct the issue.
• Error occurred while authorizing the remoting request. Refresh the page and try again.
  • An unspecified issue occurred during validation. Confirm that your access is valid, and check the console log and server log for information about how to correct the issue.