I am trying to execute the test network on hyperledger Fabric.
I have installed the following prerequisites:
- curl version 7.68.0
 - docker version 20.10.12
 - docker-compose version 1.25.0
 - go version 1.13.8
 - node version 10.19.0
 - npm version 6.14.4
 - python version (3.8.10 and 2.7.18)
 
I'm using Ubuntu 20.04.
In the folder fabric-sample/test-network: I run
./network.sh down   
and then  ./network.sh up 
then I tested
docker ps-a
It shows 2 fabric-peers and one orderer.
Now I'm trying to create a channel with ./network.sh createChannel but I got this error how to solve it??
Error: Post "https://localhost:7053/participation/v1/channels": EOF Channel creation failed