Link theming service to Run Configuration

I have created an SAPUI5 application with standalone approuter in BAS (Business Application Studio) on a Cloud Foundry environment.

I want to link the Run Configuration to the theming service I've created in order to launch the app locally with a custom theme.

Steps I've taken:

• I've created a theming service via mta.yaml
• I've created a custom theme with the Theme Designer and I've published it
• I've modified the index.html in order to use the custom theme (data-sap-ui-theme, data-sap-ui-theme-roots, data-sap-ui-versionedLibCss)
• I've added a route to the xs-app.json of my SAPUI5 application in order to link the theme path to the theming service

        {
            "source": "^/comsapuitheming.runtime/(.*)$",
            "target": "$1",
            "service": "com.sap.ui.theming",
            "endpoint": "runtime",
            "authenticationType": "xsuaa",
            "csrfProtection": false,
            "scope": [
                "$XSAPPNAME.User"
            ]
        },

The Run Configuration launches the following script

fiori run --open 'index.html?sap-client=100'

but when the application is launched all the theming resources are not loaded by chrome.

Can someone help me?

Thanks,

Pietro