Permission denied error after installing nb_conda_keernels for user conda environment

I want to enable conda environment. Following the link of Customizing User Environment — Zero to JupyterHub with Kubernetes documentation. I install nb_conda_kernels package when I pull Quay. When I run it, I got “Permission denied” error if I click icons on the Notebook section, I also get same error message when I click icons on the Other section. I only can open Terminal from the Other section and all three icons from the Console section.
How can I play the icons from the Notebook and Other section?
Second question is, after I create user conda environment, how can I remove this conda environment? Thanks.