Started getting this error message simultaneously in ubuntu and Raspberry Pi:
root@ubuntu:~# /usr/local/bin/SpeedTest .
SpeedTest++ version 1.14
Speedtest.net command line interface
Info: https://github.com/taganaka/SpeedTest
Author: Francesco Laurita francesco.laurita@gmail.com
terminate called after throwing an instance of 'std::invalid_argument'
what(): stof
Aborted
root@ubuntu:~#
pi@RPi-4:~ $ SpeedTest --output text
terminate called after throwing an instance of 'std::invalid_argument'
what(): stof
Aborted
pi@RPi-4:~ $