We are responsible only for the functioning of the service itself and undertake specific obligations for error handling. Errors are categorized as follows: Category A (Critical): All or material parts of the service are unavailable and critical business functions cannot be performed. The target resolution time is one (1) business day. Category B (Serious): The service can perform standard functions, but performance or functionality is severely degraded or limited. The target resolution time is three (3) business days. Category C (Less serious): Non-critical functions do not work, and this has little or no business impact. These errors are resolved consecutively without a defined fixed deadline. The stated resolution time begins when the customer has given us notice of the error and provided sufficient information for us to assess and understand the issue. Notice must be given by email to the email address specified in the agreement.