Error when i use selector on Uipath Studio

I have started few week ago with level 1 of RPA Dev traning. In one of exercice, i should be use selector function to launch application. When i use it i receive following error message: Impossible to load the file or assembly 'UiPath.Interop, Version=10.0.7020.22876, Culture=neutral, PublicKeyToken=XXXX. the specified file is not found.
Please do you see why i have this error message?

Buddy @jmo93

Welcome to uipath community

The reason why you get this error is the filename property that you have sent for open application is not there in your system buddy, thats y, check whether you have that file exe in your drive