[Discuss-gnuradio] Must have stuff in wrong directories, or something

I finally got gnuradio and other stuff, like gr-iio and gr-radar installed in Ubuntu 17.04 on Windowns 7 machine, but I get errors when I try to run some of the examples in gnuradio-grc-examples. For, example, if I try to load wfm-rx.grc into gnu-radio companion, I get the following errors:

I know I installed usrp and also rtl-sdr files, but apparently not in the correct place.
My directory structure is:

Any ideas where I went wrong, or how to fix this?
Ed