The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
Very strange. If you're using the latest version of Ozonex's editor and don't have an antivirus blocking the editor from reading files, I am not sure what could be causing the issue. I'm happy for you to reach out to me on Discord if you want to try walking through it though: RektTangle/CaptainKlutz#8080
