Van Rysel D100 Smart Trainer Resistance Issue on Zwift

Hey everyone, I bought a Van Rysel D100 smart-trainer 1 month ago. After buying the trainer I tried some indoor cycling apps such as Zwift and OnelapFit (an indoor cycling app like Zwift, comes with trainer). So after the first week, I have a resistance problem with Zwift. I push like 100 cadence and see 40-50 watt max. It should be at least 150. By the way when I use other app like OnelapFit there is no problem with resistance. It doesn't work well via Zwift. Did you guys face the same problem? I have seen some people who have the same issue as me. How can I fix that? Any solution? I tried lots of ways to fix that (spin down, bluetooth connection, upgrade etc...)