Gr-limesdr source block stops outputting samples when FIFO is empty

I’ve set up my system with 16.04. So far most things work, unfortunately gr-limesdr shows the same error as here:

The solution you proposed there @Osvald did not work for me. I’ve also tried to manually move all attributes in the .py file into one line, in case python doesn’t like the line breaks, as suggested here

with no success.
Not sure how to proceed now.

I’ve installed gnuradio via apt-get, the version is 3.7.9
Python is on version python3.5 (python --version yields 2.7.12)

This did it:

I’ve ran “sudo apt-get install python-swig” before, I thought that would be enough.