Can not connect Raspberrypi to

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

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

pi@raspberrypi:~/Linux-Client $ ./
– 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.
./ 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.