Problems running Nextcloud AIO on a local network

We are facing some problems running Nextcloud AIO on a local network. When Nextcloud AIO is setup for a public setting via Jacky’s method with Docker/Portainer, the installation gets a SSL certificate from Lets encrypt and works just fine, but since we’re using a installation in a local setting, although the local DNS resolution is up and running with Technitium DNS server, we’re still facing issues with actually launching the deployed hub since it relies on a external SSL certificate that isn’t generated while offline. This error is encountered in Chrome while trying to launch. “This site can’t provide a secure connection” “ERR_SSL_PROTOCOL_ERROR”
Has anyone else has encountered this issue and has any possible solutions would be greatly appreciated.

Hi, see all-in-one/local-instance.md at main · nextcloud/all-in-one · GitHub