Problem Zwift

Hello, here I got back on zwift to attack the winter but I feel like I don’t advance the watts I provide does not represent the effort provided, I use a tacx vortex, the calibration was done (I had to drive at 30 km and let the wheel turn) do you have a solution I find nothing on the net

I am French if ever for communication otherwise I will translate via Google translation

Check the instructions from Tacx carefully for the correct tyre pressure to use, and the tensioning of the roller. Without those set correctly, you won’t get near to accurate watts.