Connection failed (error 501:)

Good morning Everyone,

I need help fixing this issue.

I'm Using Cloudflare Tunnel with Proxmox and Home Assistant, and it works very well. but with my proxmox when I try to access my pve <subdomain> it shows this error at shell and console still, I can add in settings and create VM & CT but I can't use the Shell.
FYI the local IP for proxmox working perfectly this issue is only through online use.