The 401 authentication error can also occur in various other forms as seen below:
401.502: this error occurs when a certain client (sam IP) requests different times on a server and reaches the limit of the IP Restriction Concurrent.
401.504: this error shows that the client’s hostname is in the banned IP restrictions list at the server-side.
401.503: This error indicates that the client’s IP address is in the banned IP restriction list at the server side.
401.501: This error indicates that the client has generated numerous requests. In simple terms, this means the client has reached the maximum request limit.
401.3: This error indicates that the login failure is a result of the Access-control list (ACL) on the resource. It also indicates that authorization failure is due to the filter
401.2: This error indicates that the login failure is a result of server configuration
401.1: This error indicates that the login failure is due to specific reasons
Best thing to do is to open a ticket requesting assistance from the UCD support team. They can troubleshoot this issue and if needed, contact development for assistance.
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