EasySolar-II GX display issue

Victron Energy EasySolar-II 48/5000/70-50 MPPT 250/100 GX Inverter An issue occurred after connecting case grounding to fresh-mounted PE device, while inverter was off-grid and supplies AC1
The display itself is functioning, but it doesn’t light up. I can still access the Remote Console via VRM.Changing the settings in the “Display and language” menu and rebooting the inverter do not help. Has anyone encountered this problem?

Whats a PE device in this context? Im expecting a ground rod for example, but i would not call that a PE device. Maybe just a translation issue.

So in summary you connected something to the EasySolar housing while it was running and providing power to your offgrid installation?