onActivityResult crash

hi, I’m failing to get the name from the contact list, i have tried all the solutions given in previous
chat threads I’m get an alert on debugging that - "Source code does not match the byte code "
could it be that I have a problem in the build file? and that I need to copy everything to a new project?

(when I first got to the chapter and implemented the implicit intent all worked fine and then when I opened the project the next day the problem started. and the continued when I went on to Photo implicit intent chapter )

thanks for the help.