nmap not showing scanned ports

Hi guys,
I am using kali linux on virtualbox when I am running nmap -sV -Pn -T4 machineip command but not any port showing up it’s only not working on hackthebox machines. When i trying on normal websites ip it’s works well, what can i do ?

I found the problem guys. I was connecting to HTB VPN when i download starting point vpn it’s works