It means you do not have the linux-headers installed for your running kernel.
The following command will install the linux-headers automatically for all installed kernels but you are better using a LTS kernel:
Thank you for your response.
I tried running the command you listed and I’m still getting the same error. I installed linux-lts and linux-lts-headers as well but the error also occurs.
I still cannot run sudo vmware-modconfig --console --install-all but after removing vmware workstation and reinstalling in the LTS kernel I do not get the original vmmon error. Thank you for your help.