Looks like iOS 13.0b5 (17A5547d) broke WKWebView using loadFileURL (local files using file://).
Results in "WebPageProxy::Ignoring request to load this main resource because it is outside the sandbox" after an "Received an unexpected URL from the web process: 'file:///Users/felipek/Library/Developer/CoreSimulator/Devices/A533E3EF-6427-477F-B4D0-843E71BA4550/data/Containers/Data/Application/366BB0F1-7B67-441B-A406-75D76DABF510/Library/app.id/Profiles/586187784/Resources/NGTTemplateResult.html'"
Reported as FB6860565 - WKWebView: WebPageProxy::Ignoring request to load this main resource because it is outside the sandbox
After Checking on iOS 13 Beta 5 (developer) that was released recently, I've noticed that the first workaround is no longer required and WKWebView manages to load(_ request:) the local file. However the loading of /nextPage still generates the outside the sandbox error message.
Is there a solution to this problem?
We have the exact issue in out application. Could you please let us know whether you managed to get a response or fix the issue ?