I'm using VMware Workstation Pro 15.1.0 build-13591040 in Windows 7. When no virtual machines are running the icon is white and invisible since the background is white. Here's a picture:
In the picture above the hidden icons are shown (when you press the ^ on the tray to see icons that are only set to show notifications). The vmware-tray.exe icon is between the flag icon and USB hardware icon, but the squares are all white so it can't be seen on a white background.