Can't "build and run". Can only use the "build "option

I have been having a problem where I can not use the build and run option, only the build button works. So i am able click the "build" option and select the build folder, etc. I am working on networking meaning I have to build my project basically every time I want to run my game. Therefore it would be so much more convenient if I could use the build and run option by hitting ctrl-b. The errors I get when using build and run are:

Build completed with a result of 'Failed' UnityEditor.EditorApplication:Internal_CallGlobalEventHandler()

and

UnityEditor.BuildPlayerWindow+BuildMethodException: 16 errors

at UnityEditor.BuildPlayerWindow+DefaultBuildMethods.BuildPlayer (UnityEditor.BuildPlayerOptions options) [0x00242] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:194

at UnityEditor.BuildPlayerWindow.CallBuildMethods (System.Boolean askForBuildLocation, UnityEditor.BuildOptions defaultBuildOptions) [0x0007f] in C:\buildslave\unity\build\Editor\Mono\BuildPlayerWindowBuildMethods.cs:97 UnityEditor.EditorApplication:Internal_CallGlobalEventHandler()