Probaly it is related to a configuration issue, I do not know what your target is to reach with that project, but infact that it doesnt work leads probaly to a missconfiguration.
As you can find in the following posting, we see hestia as solution for sysadmins with a decent knowledge about how to handle serversystems: Please read this, before you start!
So if you want to have help, please provide more informations than what you wrote in your first post. Basicly, you didnt wrote how you setup the dns, just that you added the “dns to your local network conf” - whatever this means. If you want to use hestia as central dns server you also could setup a resolver and so on, but this depends on your target you want to reach.
So a first start would be to debug with nslookup/dig requests on the hestia server, probaly check the bind log if the requests are showed up properly.
Currently, due to the lack of informations, it is just not possible to help you. Also I can confirm that hestia doesnt have any problem in its bind configuration, it works properly - this leads to a local (configuration) issue.
I hope you understand now my position after the long explanation a bit better.