How to launch a project? I get errors

[jhon65496]

How to launch a project? I get errors

Severity Code Description Project File String Suppression Status Error CS0006 Metadata file could not be found "E:\Projects\Projects\Presentation\bin\Debug\Presentation.dll ". UI E:\Projects\Projects\UI\CSC 1 Active Error CS0246 The type or namespace name "BasePresener<,>" could not be found (perhaps the using directive or assembly reference is missing). Presentation Error CS0246 The type or namespace name "BasePresener<,>" could not be found (perhaps the using directive or assembly reference is missing). Presentation Error CS0246 The type or namespace name "BasePresener<>" could not be found (perhaps the using directive or assembly reference is missing). Presentation Error CS0115 "MainPresener.Run(User)": A method suitable for redefinition was not found. Presentation Error CS0115 "ChangeUsernamePresenter.Run(User)": A method suitable for redefinition was not found. Presentation

VS- 2019