The problem abou the practice of lesson5 of the foundation training

[tongliang]

I try to run the practice 1 of the lesson5 of the foundation training.It is canverted forcely when opened. And then there is below exception message box poped.
19.10.0-beta.90+Branch.release-v2019.10.0.Sha.ed11515279eee4447b9cc03a899373aa74312c09

来源: Attach Browser ‘LaptopeBay Page’

消息: Error: LoadString(102) failed!

异常类型UiPath.Core.SelectorNotFoundException

RemoteException wrapping UiPath.Core.SelectorNotFoundException: Error: LoadString(102) failed! —> RemoteException wrapping System.Runtime.InteropServices.COMException: Error: LoadString(102) failed!
在 UiPath.UiBrowserClass.Find(String bstrSelector)
在 UiPath.Core.Browser.Find(Selector selector)
— End of inner exception stack trace —
在 UiPath.Core.Activities.ScopeActivity.EndExecute(NativeActivityContext context, IAsyncResult result)
在 UiPath.Core.Activities.AsyncNativeActivity.BookmarkResumptionCallback(NativeActivityContext context, Bookmark bookmark, Object value)
在 System.Activities.Runtime.BookmarkCallbackWrapper.Invoke(NativeActivityContext context, Bookmark bookmark, Object value)
在 System.Activities.Runtime.BookmarkWorkItem.Execute(ActivityExecutor executor, BookmarkManager bookmarkManager)