On the PC where it is installed Photoshop CS6 cloud, there is a tablet Wacom Cintiq 21.
With previous versions of photoshop that I had installed on the PC I had no problem.
With this version I do not recognize the pen pressure, says that the tablet does not support it. What should I do?
First of all try to disc9onnect and reconnect the Wacom and check.
If that doesnt help try to update the drivers for Cintiq and check.
In most of the cases it should fix the issue, but if you still see the issue try unintsalling the drivers for Cintiq from Device Manager and Programs also and then Reinstall the most recent versions.
Alternatively, you can contact Wacom Support too.