Thank you @LanderU That works. I can now run blockly.
Trying to test basic code such as blinking blue LED by using the pre-made blocks under Erle Brain. The files are not found when I try to launch. I'm assuming I can launch the code directly by selecting "launch" in the robot_blockly web portal.
Then you can see the error "can't open file".
It seems the file structure maybe different from the erle brain documentation. For example there is no folder "ros_erle_statusled" within ~/spider_ws/src/ folder.
I also checked ~/blockly_ws/ workspace but no such file or folder. Do I need to download these files in addition to blockly installation?
My goal is to create packages for quad copter and RPLidar using blockly.
Thanks for any advise!