That’s quite weird, it shouldn’t give errors like that.
Accidentally, have you any semicolon or weird characters in your windows username, or in the destination of the folder, where you saved the project? It may contain characters that can mess it up.
Also, i have made some screenshots after i quickly created a new project to test it with 4.12.5 and for me it’s working as it should, you can see the screenshots below.
http://prntscr.com/bs2tk9
http://prntscr.com/bs2tlq
http://prntscr.com/bs2tku