Check the network, update the software, and troubleshoot the background.

Electronic signature refers to the data contained in the data message in electronic form and accompanied by data used to identify the identity of the signer and show that the signer approves its content. Generally speaking, electronic signature is an electronic signature of electronic documents through cryptographic technology, which is not a digital visualization of written signature, but similar to handwritten signature or seal, and can also be said to be an electronic seal. The electronic signature is not responding, which may be

1. The software may need to be updated.

There is something wrong with the network.

3. It may be a background fault.