If Li Si government affairs network can't call the electronic business license signature interface, there are many possible reasons, such as network failure, server problems, expired certificates and so on. It is recommended to check whether the network connection is normal before attempting to restart the server. If the problem cannot be solved, you can check whether the certificate has expired or whether it matches the interface. If the problem cannot be solved, it is recommended to contact the system developer or related technicians for further investigation and solution.