Postiz could not work only on secured servers, only https / localhost.
This is because we used secured cookies are available only to the server.
That resulted in many support questions and people who can't run Postiz.
Now you can pass a new env variable called NOT_SECURED=true. This will allow you to run Postiz on a nonsecured server.
We recommend everybody work on a secured server, but we can understand if you can't.