ERROR: Repository not found.
fatal: Could not read from remote repository.
This is not very clear, your remote library was not found,
You should deploy it to github,
Check whether you have added the corresponding library on github.
Is the address of your local library correct?
This is not very clear, your remote library was not found,
You should deploy it to github,
Check whether you have added the corresponding library on github.
Is the address of your local library correct?
Check whether the url parameters of _config.yml are set correctly
Delete the project stored locally, and then download a new copy from github.
See if you are not under the version branch.