In this video, I will show you how to fix "Cannot currently show the desktop" message in VNC Viewer. This usually happen if your Pi is not connected to monitor via HDMI.
+++++++++++++++++++++
STEPS
+++++++++++++++++++++
Step 1: Login raspberry Pi via Putty.
Step 2: Type in sudo raspi-config to open Pi software configuration tool.
Step 3: Scroll down to [Advance Options].
then scroll down to [Resolution].
Set your preferred resolution then click OK. Click Finish then reboot.
Step 4: Done. You should now be able view desktop via VNC viewer.