Hi,
The issue is most likely related to the default script URL which uses HTTP. Can you please try changing the URL to use HTTPS?
Example:
TIWWebOSMaps1.MapOptions.ScriptURL := 'https://openlayers.org/api/OpenLayers.js';
If the issue persists, please check for JavaScript errors in the browser developer toolbar (press F12, then select the "console" tab).