Android 10+ api 30 also broke native webview especially with removal of cleartext allowance. Local html files in temp or document directory no longer loading in app via native webview, get ERR_ACCESS_DENIED. @vlads can you take a look at that as well please. I don’t think can revert back as clear text is no longer allowed by google.
This link has some guide on what change has to be made to that api in 30 for it to work: