Error on preview only behind proxy/load balancer

We receive the error “cannot load form from server” when trying to preview the form. It only happens when it is behind a proxy.
Do you know if the proxy needs any special configuration? Should we have to change anything in kobo config?
I add screenshot:
image
Thanks a lot in advance.

Isaac

Hi @xoako,

Welcome back to the community! Have you also tried previewing your survey form through the HHI server of the OCHA server? Do you see issues in these servers as well? It could be a problem of your xlsform if you see similar error message in these servers as well.

Have a great day!

Hello Kal_Lam and thanks a lot for your repply.
Our tests in OCHA server were suscessfully. Also, if we remove the proxy/load balancer and visit directlythe frontend it works fine.
Any suggestion?

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Hi.
We finally solve it by editing the docker-compose-frontend file and enabling some extra hosts in it.
Thanks a lot for your asistance
Best.

Isaac

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