Unable to create connection to localhost with Defold

Hello,
I tried to follow the demo tutorial of Colyseus with Defold (image below - lua)
But the app can not connect (create/join) to room with localhost.
When I replaced the localhost by the demo url on herokuapp, the code worked normally.
I don't know the reason of this issue.

Localhost can accesed on browser. But unable in Defold.

Does anyone has experience on it.
Help me please.
Thanks

Can you test the server with another client?

@virtumonde said in Unable to create connection to localhost with Defold:

Can you test the server with another client?

I did test, but same issue. Even with creating new project.

Oh god of divine authoritative servers, @endel please share your insights about this problem.