I received that error using master control panel version 3.7.1 While using the last nRFgo Studio (1.21.2) it tells me JLinkARM.dll is not correctly installed. Please run the nRF Tools installer to install the newest version. I tried to unistall and reinstall those software several times and different software versions but with the same result. The PC has Windows 7 64 bit Service Pack 1. Thank you
