Data Collector form download server connection refused

1. What is the problem? Be very detailed.

hi, hope everyone is ok.
i'm having a problem on my odk collector
i've set up ODK Aggregate using a google drive VM.

I not having trouble login in my server but when trying to download forms from ODK Collect i run into a problem.

Registation form Cnema (ID:**********) - failed to connect to from / 51832) after 30000s: isConnected failed: ECONNREFUSED(connection refused)

2. What app or server are you using and on what device and operating system? Include version numbers.
google drive vm- Ubuntu 18.04.4 LTS server
odk collect -android version 8.0.0

3. What you have you tried to fix the problem?
i tried to fix the problem using a firewall rule to allow my ip to pass and acess but it wasnt good, i thought my problem could be in my firewall and could be blocking me

4. What steps can we take to reproduce the problem?
not sure i tried to config everything like it is on odk pdf but i dont mind to give permission if someone is willing to help me

5. Anything else we should know or have? If you have a test form or screenshots or logs, attach below.
Formulário Cnema 25.xml (4.1 KB)

thank you

Hi @samueldavid,

If I try to reach it works (http not https).
Did you configure your ODK collect correctly?
Please check it and set as URL for the server

Hi @aurdipas,
Thanks for helping me.
I think that i did a correctly configuration on the server because im able to see the forms but im not able to download it and fill it. Everytime that i try shows me that error

I see you are on hhtp and not on htpps.
Diûring the wizard to generate the war, did you leave the http and hhts port as in the picture

Schermata 2020-06-25 alle 22.50.23

what abou the dns: Schermata 2020-06-25 alle 22.52.10
did you enter just