user space

Hi all, recently ive been using ngrok (a tunneling program) to expose my local ubuntu 20.04 minecraft server. For security purposes I decided to create a dedicated non-sudo user to run the minecraft and ngrok process. the problem though is when i try to launch ngrok i get this message...

Hi, Are there projects using lwip stack with linux (used in the kernel or in the user space)? And what are the advantages of each (working in kernel side or user space) ?