Hi Dan,
To reference SAP UI5 library from within your MII workbench content you need to deploy SAP UI5 sca which you can download from SMP for the SAP netweaver version.
Then you should be able to reference it this way in your html page:
src="/sapui5/resources/sap-ui-core.js"
After deploying SAP UI5 sca you should be able to access it as shown below:
http|s://<host>:<port>/sapui5/resources/sap-ui-core.js
Also what is the SAP Netweaver version that your MII is running on?
Thanks and Best Regards,
Ria
