I'm using Worklight Studio version 7.1 on Juno Eclipse 4.2.2 - and the Rich Page Editor fails to load when any index.html file is opened.
See screen-shot image (I couldn't post it here, so its on Dropbox)
https://www.dropbox.com/s/c49l78l7w6s42b5/worklight-studio.png?dl=0
I was able to load the RPE in Worklight 7.0 and earlier versions with the same exact eclipse version. Not sure what is so different with Worklight 7.1
Any pointers ?
In Mac, this works for me in a new project: https://i.sstatic.net/FqLOt.png.
Does this fail for you with a new project or existing project?
You can use Eclipse Kepler, Luna or Mars instead as an alternative to Eclipse Juno. Or at least check if it fails there as well.