Do you now have the “M” or “L” subscription?
Did you install the CNLAB on the PC as mentioned by @Werner, i.e. not via the link?
If you mean local by installation, OK.
https://www.cnlab.ch/speedtest
See info below from CNLAB!
Internet users use the cnlab Speedtest to measure the quality of their Internet connections. The cnlab speed test in the browser offers a quick overview of the internet connection with a data rate of less than 200 Mbit/s. However, the reliability of the measurement depends heavily on the performance of the computer and browser. For reliable tests with faster connections, it is better to use the Speedtest program (or the mobile app). These also offer more detailed evaluation options and automatic assistance in the event of problems
Installationen, Netzwerk, Internet, Computertechnik, OS Windows, Apple und Linux.