Resource not found error, please help

[Iulian19768]

Hello, i am trying to use hector_slam to create a map for an autonomous robot.
I am following this tutorial: https://www.youtube.com/watch?v=Qrtz0a7HaQ4&t=426s, I have ros melodic, and the lidar i am using is this one : https://www.okdo.com/getting-started/get-started-with-lidar-hat-for-raspberry-pi/.
Ok, now back to the problem, i have the following issue, when runnng this command : roslaunch tutorial.launch:

`logging to /home/robotica/.ros/log/e8f0e262-7658-11ed-8c0a-dca6329ba782/roslaunch-raspberrypi-1713.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

Resource not found: The following package was not found in : hector_geotiff
ROS path [0]=/opt/ros/melodic/share/ros
ROS path [1]=/home/robotica/sdk_ld06_raspberry_ros/src
ROS path [2]=/opt/ros/melodic/share
The traceback for the exception was written to the log file
`

I don' t know why it says Resource not found, please help!