Possible Causes
Scenario 1: No business domain name is configured.
Scenario 2: The business domain name does not take effect.
Solution
Scenario 1: For an atomic service to load an HTML5 page through the AtomicServiceWeb component, you must configure a business domain name, as well as the domain names for any iframes within the web page.
Scenario 2: The domain name configuration takes effect in 24 hours by default. To enable the configuration to take effect immediately, remove the atomic service by choosing Settings > Apps & services > Services > Remove this service, and then install the atomic service again.
If the white screen persists, the page code may be incorrect. You can use a browser to open the corresponding page to check whether the page is normal, or use DevTools to debug the page. For details, see Debugging Frontend Pages by Using DevTools.