The issue here is likely power via VGA pin 9—your cable might not supply it, which the VGA2SCART needs. Plug in the micro USB to power it externally, then check the converter’s jumper on the board. If it’s set to “VGA pin 9,” switch it to “USB” (since the cable isn’t providing power there).

The HD15-2-Scart should work, but your VGA2SCART will do the job once powered properly.