site not reacting on MIDI

[hast66]

I have connected my Arius digital piano to my laptop via USB. With the apps Vital and Surge XT, MIDI is working perfectly.
But the site Sightreading. training doesnt react on the MIDI signals.
In device setup, input device "2- Arius-1" is visible.
In chrome, MIDI device control & reprogram is set to Allow.

What am I missing?

[leafo]

Does you keyboard work fine on other websites? https://studiocode.dev/webmidi-tester/

[hast66]

Yes no problem.
I also tried incognito and all other midi apps are closed

[hast66]

are there any other settings in chrome I should attent to?
Extention issues?

[hast66]

I have downloaded "yamaha steingberg usb driver"
Now midi is working on the site "teoria.com" and https://www.midimonitor.com/
But still no reaction in Sightreading. training