The idea is to add that line in the 'Open Workbook' code stage before the open command
Dim app As Object
app = GetInstance(handle)
app.DisplayAlerts = False 'generally better for RPA as you dont want alerts popping up
Dim wb as Object = app.Workbooks.Open(fileName, 0, , , , , True)
....
The second parameter means updateLinks set to False, and the True parameter is to set ignoreReadOnlyRecommened=True