I think it may have something to do with nodejs v8 as I had encountered something similar where the install gets stuck in an infinite loop until you manually break it and then when you redo it over again it won’t get stuck and seemingly completes without issue, except you have these “CREATE_NEW_SERVER” and “SERVER_SETTINGS” which you aren’t supposed to see once the web ui is fully loaded. I’ve been meaning to create a post on the subject but wanted to redo testing first to see whether or not that’s the issue but just haven’t gotten around to it due to lack of space and some other things I had happening, I should be able to test in the next few days though unless someone beats me to it. I updated the instructions on my site since mine are specific to Oracle Java 8 rather than OpenJDK 8, then had done a fail steam on how to do it since that loop problem occurred and I ended up just deleting the stream and doing something else in it’s place for the time being.
Anyways, try resetting the web ui (I’m on mobile currently, I’ll add the link to that when I can but for now the wiki you got the instructions from is where you’ll find it), and if things still do not work or get stuck in a loop then that confirms it wasn’t just me or a coincidence. The thing to try after if it doesn’t work would be replacing nodejs 8 with nodejs 4 (I recalled it being nodejs 5 before 4 though but try 4) and then trying it again.