"RLException: [simulation.launch] is neither a launch file in package [ur3 sim] nor is [ur3_sim] a launch file name" error

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https://github.com/EuropeanRoverChall...

I am trying to start the program with the roslaunch ur3_sim simulation.launch command in the "Run Simulation" section at the bottom using the commands in this link, but when I type the roslaunch ur3_sim simulation.launch line, I get this error:

RLException: [simulation.launch] is neither a launch file in package [ur3 sim] nor is [ur3_sim] a launch file name The tradeback for the exception was written to the log file Note1:

sudo rm -r universal_robot/ur_msgs

commend didn't work, but I don't know if that issue is relevant this command.

Note2: I use "Install on the host system" section instead of "Using Docker"

How can I solve this issue?