W-B05 BMS cable fault with Lynx BMS NG and NG Lithium

I am not sure why you have this fault. What I can tell you is the loop around check does not work with the NG BMS, even if the NG BMS is OK it will error with the loop around. Victron are aware they need to update the manual. You could therefore have an issue in your battery BTV board or the BTV cables or the BMS. I checked the looparound on my BMS as has one other person.