The SAP user provided does not have authorization to log on to interface XAL / XBP. You need a SAP user profile with the following authorization objects: S_RFC, S_XMI_LOG and S_XMI_PROD.
Under S_RFC authorization objects, the Name of RFC object to be protected is configured as * by default. If you wish to modify the value, please make sure that SYST function group is included.