Unable to access subdomain after creating organization

[CTtest725]

I created a new organization and tried to access the page via subdomain, which I set it to be "testing". However it didn't seems to be working and I could not access it.

with the subdomain:

without subdomain:

I have checked mongodb and the organization is indeed created and I have tried restarting both the server and dashboard already but it didn't help.

Not sure is this the cause of issue but I am using AWS EC2 to create this project. What can I do to fix this?

Thanks in advance and I appreciate the good work you all have created!

[CTtest725]

Updated: Solved by adding the ip address to my computer's host file. Assigning both to the same ip address is fine.

E.g.
192.168.0.1 example.com
192.168.0.1 subdomain.example.com

then the whole url will be:
subdomain.example.com:45000