Vcgencmd not present but it's there

Hello everyone, I had not updated for a few months (since it was necessary to download the new V6 image) and I did it yesterday.
With the new version an Android Widget that I often use to check my RPi3 doesn’t work anymore: it requires the use of vcgencmd, yet it is present in the required directories and root user is part of the group video.
What can I do? Thank you so much.