我正在开发一个需要主题浏览器的Ionic 3应用程序。一切都很好，主题浏览器正在工作。现在发生了一个错误，但我不知道如何。我在添加和构建ios平台后收到错误。
themeablebrowser插件不再工作了，在Xcode中我收到此错误：
@autoreleasepool {
int retVal = UIApplicationMain(argc, argv, nil, @"AppDelegate");
return retVal;
}
这里的错误
2017-09-21 03:22:53.022 toufoulakids[553:107535] -[CDVFileTransferDelegate connectionDidFinishLoading:] [Line 637] File Transfer Download success
2017-09-21 03:22:53.216 toufoulakids[553:107195] -[__NSCFString charValue]: unrecognized selector sent to instance 0x15537d60
2017-09-21 03:22:53.222 toufoulakids[553:107195] *** WebKit discarded an uncaught exception in the webView:decidePolicyForNavigationAction:request:frame:decisionListener: delegate: <NSInvalidArgumentException> -[__NSCFString charValue]: unrecognized selector sent to instance 0x15537d60