Hey there Casidesigns 1 star is totally valid right now as it is currently under development, but you should see functionality as of the latest (0.3.1). :(
I read through rules again just in case, and posting a work in progress seems to be okay. It's just as long as it isn't low effort and has had updates recently.
Please create an issue on the GitHub repository (
https://github.com/sammypanda/MCJE-PlayerQuests-Plugin/issues) with the log messages. I haven't had any other tests so far. It would help me lots to fix the issue you're having, so you could see the progress so far.
Also, please note this plugin is free and I'm not planning to make any money off of it or anything scheme-y like that. I just want to share with others and grow it together in community.