Why can't I copy from VMware guest to Ubuntu host, while I can do the reverse (from Ubuntu to Windows 7 guest)

Question

I am currently using Ubuntu 19.04 and using VMware for virtualization.

In a virtual machine I am running Windows 7 and I installed VMware Tools on Windows 7. The problem is that I can copy anything from my Ubuntu host to Windows 7 guest, but I cannot copy things from my Windows 7 guest and paste to Ubuntu host.