C&P from Remote DeskTop inside Virtual Lab

Hi There.
In lab Windows: Enabling Remote Desktop (INE) after finding the flag I couldn´t copy it and paste in any place (neither attack box and my system).

Transfer clipboard explained (CRTL+SHFT + ALT) does not solbe issue.

I round problem using another technique and download file to attack box, but id I couldn´t do it, how proceed?

Can you help me?