Can not connect Raspberrypi to Thniger.io

Hello,
I want to connect Raspberry Pi to the Thinger platform. I followed these instructions–>

https://docs.thinger.io/quick-sart/devices/linux

When I run the “./run.sh” command, I get the following message. (see line 6 and 7)

pi@raspberrypi:~/Linux-Client $ ./run.sh
– OpenSSL Version: 1.1.1d
– Configuring done
– Generating done
– Build files have been written to: /home/pi/Linux-Client
make: *** No rule to make target ‘thinger’. Stop.
./run.sh: line 6: ./thinger: No such file or directory

I really don’t know what to do. I’m relatively new to Raspberry Pi. Does anyone have any idea why this message came up? Thanks in advance.