Assertion failed: The attr name provided ‘xmlns:html’ is not valid

[#1]

Hello SAP Fiori Elements Experts,

in my sample applicaiton https://github.com/gregorwolf/test01/tree/diagram-tab (make sure to use the diagram-tab branch) which can be started via:

npm i
cds watch

the Fiori Elements App can be started at:

http://localhost:4004/launchpad.html#Functions-manage

I get the console error message:“assert-dbg.js:33 Assertion failed: The attr name provided ‘xmlns:html’ is not valid; it must contain alphanumeric characters, hyphens or underscores”I’ve already found that this error to be thrown from

https://github.com/SAP/openui5/blob/master/src/sap.ui.core/src/sap/ui/core/RenderManager.js#L227

it seems to be caused by the Namespace we’ve defined for

Using Native HTML in XML Views in: https://github.com/gregorwolf/test01/blob/diagram-tab/app/functions/webapp/ext/view/CustomViewWithBu...but the https://gojs.net/

graph is rendered correctly. But what’s not working is that the graph is sown when I refresh the page. Also when I change something on the fragment I need to delete the Index DB to make the change visible.Looking forward for your help.

Best Regards
Gregor