The runner has received a shutdown signal. This can happen when the runner service is stopped, or a manually started runner is canceled.

The operation was canceled.

The 'defaults' channel might have been added implicitly. If this is intentional, add 'defaults' to the 'channels' list. Otherwise, consider setting 'conda-remove-defaults' to 'true'.

Unexpected input(s) 'execute_notebooks', 'binderhub_url', 'timeout', valid inputs are ['file']