Talk iOS and ATS

Long shot question. I am trying to setup a server using the container release of NextCloud and I wanted to enable Talk to use with that iOS app.

Using the example files available on github makes the installation very smooth.

Problem is when I try to use Talk with the iOS app. I get the ‘NextCloud server not found’ error. I understand that the Nextcloud server needs to fulfill ATS requirements as stated on the project’s gitHub page and I believe that indeed my issue is due to the self-signed certificates.

I understand the need, but I am greatly out of my depth here. Could someone point me out how to solve this problem so I could have a fulfillment of the security requirements imposed by Apple for its devices?

It is the issue with self-signed certificates. After I had installed a “let’s encrypt” certificate the app found the NC installation and I could have signed in.