Chose the “+” to create a new “html” content page for the node project and I keep getting this notice.
Edited: hmmm, not sure this is actually correct, because it doesn’t in node project.
I don’t seem to be able to create a page and have it linked to the project, keep getting this notice!
It will not save without getting this notice and it;s in the project content file.
Issue found but don’t have the time to document.
Well, without explaining how to recreate this at least we won't be able to fix it 
will get to it.
This n mi rans that somehow your page is saved outside your project folder.
Did you maybe created a new project? And maybe changed the server model to NodeJS later on? You should do that from the start.
No, still using the same project. I did open a file outside the project just to check some code and then closed it (maybe saved it) and after this it started happening on all new project files even when I was saving to the project folder.