This is a known issue affecting VMware ESXi 5.5 and 6.0.
Currently, there is no resolution.
To work around this issue, change the virtual machine's .vmx file setting pciPassthru0.msiEnabled from true to false.
To change the virtual machine's vmx file setting pciPassthru0.msiEnabled from true to false:
Note: Make a copy of a file before editing it, and the virtual machine should not be running while trying to edit one of its components.