I’m not sure when this came up. I have bootstrap as the included theme in the project. (Yes, I have the ability to change themes in the app, but this is before I do any changes, eg, so bootstrap is the only theme used when the error occurs).
DevTools failed to parse SourceMap: http://127.0.0.1:63353/Project21/toolbox/bs4/dist/js/bootstrap.bundle.min.js.map
This file does not appear in the above folder. I don’t see anything wrong with the rendering or functionality of the BS4 controls, etc.