Further thoughts I removed Jamie Kowalski’s jmk_panel and for now application is starting up. I mentioned wiki links, I don’t have the foldingtext-extra for that and slightly embarrassed I think that was a red-herring. I wish I would be able fix it, but sadly no real javascript skills. https://github.com/jamiekowalski/foldingtext-extra maybe needs some tweaks, I certainly wish the jmk_panel could be incorporated into the application.