Impossible to start https listener any other way than simple "https" command

[kr3tu]

Hello!
Apologies if my question is dumb, I am new to all these.

I am trying to follow this article:
https://medium.com/@youcef.s.kelouaz/writing-a-sliver-c2-powershell-stager-with-shellcode-compression-and-aes-encryption-9725c0201ea8

Steps to reproduce the behavior:
0. I created pem and crt files following:
https://www.darkoperator.com/blog/2015/6/14/tip-meterpreter-ssl-certificate-validation

1. I first created a profile:
   sliver > profiles new -b https://3.79.14.3:443 --skip-symbols --format shellcode --arch amd64 local
   It worked well.

2. Then I tried to start https listener at port 443:
   sliver > https -L 3.79.14.3 -l 443 -c /home/ubuntu/crt.crt -k /home/ubuntu/key.key
   Unfortunately I am getting an error - PFA.

3. FYI - I was able to start stage listener without any problems though:
   sliver > stage-listener --url https://3.79.14.3:8080 --profile local -c /home/ubuntu/crt.crt -k /home/ubuntu/key.key -C deflate9 --aes-encrypt-key D(G+KbPeShVmYq3t6v9y$B&E)H@McQfT --aes-encrypt-iv 8y/B?E(G+KbPeShV

I don't have anything else listening on 443. Actually if I choose any other port like 4443, it is the same error. If I try to run this without crt and key for a test, it is still the same error. The only was "https" command works is when I run it without any additional switches and values...

Please kindly help.

Desktop (please complete the following information):

• OS: Ubuntu hosted on EC2
• Ubuntu 24.04.1 LTS with the most recent Sliver running