Compare the same address
Open the page in a full browser. If it works there but remains blank inside an app, the problem is specific to that app or embedded browsing environment. If it fails in both, check the address and connection before changing device settings.
Use ordinary update routes
Check the app’s own update process and your device’s normal software updates. A search result labeled WebView fix is not evidence that a particular file is needed. Record the app name, version, and error text if you need its publisher’s support.
Keep playback separate
A catalog page can load correctly while a selected viewing service has a player issue. Here, Watch now opens JustWatch in a new tab. Once you choose a service, its player and account controls handle the video rather than this catalog’s web page.