Issue starting full Web IDE in trial Neo

Until 30th May 2018 I was able to launch the full web IDE from the SCP cockpit with the URL https://webidecp-pxxxxxxxtrial.dispatcher.hanatrial.ondemand.com/ I cloned a repository from GitHub and setup my CF link. Building the DB module worked OK, and I could connect with the Database Explorer. I have a node.js app with an xsodata, which is still working. Today, when I try to launch the full IDE, I get the logo, and then just a popup

The only change that I can think of is that yesterday I added the Workflow builder function to my workspace.