If an error occurs, right-click on the project and unload it. Then, right-click again and choose 'Edit'. After
that, search for 'DevelopmentServerPort'. You will find the following lines
<DevelopmentServerPort>62343</DevelopmentServerPort>
<DevelopmentServerVPath>/</DevelopmentServerVPath>
<IISUrl>http://localhost:62878/</IISUrl>
Remove these lines, then reload the project. After that, run the project, and it will work.