If I understood well the KB article, in order to have Workstation/Player run concurrently with Hyper-V you need to upgrade to at least Windows 10 build 19041.264 (aka Windows 2004). The latest Win10 build is 19041.329.
If you need to stay on Win10 1909, you should disable Hyper-V. See MS article https://support.microsoft.com/en-us/help/3204980/virtualization-applications-do-not-work-together-with-hyper-v-device-g