UiPath can't find selector after 1 hour (before that time it was normal operation)

Help Activities
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3

Detail of Process 1 and 2
1/ UiPath.Core.Activities.UiElementExist
wnd app=‘msedge.exe’ cls=‘Chrome_WidgetWin_1’ title=‘.xlsx ’
2/ UiPath.Core.Activities.BrowserScope
html app=‘msedge.exe’ title='.xlsx’