failsafe enabled: no datalink

[gabrielzitoo]

I got this error while trying to takeoff the drone in gazebo with ros2:

In this case, the issue is solved by oppening QGroundControl (it works as a receptor of information for the simulation - a datalink).
if you got another error "manual control lost", go to QGroundControl application settings and enable the "virtual joystick" and the "Auto-Center Throttle" in the "general" settings.