Load LUT button not working - Mini Converter SDI to HDMI 6G

Hi
When I try to load a new LUT to my device, nothing happens when I press the LOAD button in the VIDEO tab of Converters Setup

I already have some old luts loaded, it worked in the past, but now, the LOAD button is not working, so I can't load a new LUT to my device

Edit: Tried 2 different windows machines, and a macOS. Also tried downgrading the software, used versions 10.3 and 9.0.2, with the same result.

Reverted to version 7.6.2 and got it working

Still doesn't work in the newest version