1.You should click "Issues" ->"New issues" ->add title for example "There are problems with the codes, need to be fixed." ->in "Write" print ``` -> copy your code -> ```-> "submit new issue"
2.Assign tasks to sb.->Labels:choose the exact one ->open this branch with GitHub Desktop.
3.Now click "Open in VS code" not "Preview Pull Request"
4.When you finish editing the code, click "Creat Pull Request" not "Preview Pull Request"