I installed robot_blockly on a freshly installed laptop (Ubuntu 16.04, ROS Kinetic). After some hassle with commenting out the unnessessary import lines (which I suggest to remove if its an official ROS package) and not using the make_isolated command (which only threw errors but normal catkin_make worked) I got it running.
But now I have a strange behaviour using blockly: once I designed a program and launched it, I cannot edit it anymore. Is this intended or an error? After launching a program (and end the execution) the only way to re-edit this program is to have it saved to file before, and reload it into the browser (Firefox). Which is some kind of annoying of course. I also tested this from another PC (Firefox and Safari on MacOS), same behaviour.