How can I solve http 0 error?

Question

I have already configured rpcallowip = 0.0.0.0, check the params.dat file and the default port is the same one that appears when the node starts, and it is the same port but I still see the error.

Answer 1

I assume you're talking about a problem in the Web Demo? If so please check you're using the RPC port and not the peer-to-peer port, and also stop and restart the node after setting rpcallowip.