Do you use VMWare's ESXi for tinkering?
Broadcom has unfortunately killed that free offering following their acquisition of VMWare late last year (https://kb.vmware.com/s/article/2107518)
Good news though - there's better options!
Switch to (superior) Proxmox:
- open source
- light footprint
- easy to manage
Get it here: https://www.proxmox.com/en/
Learn it here: https://www.youtube.com/playlist?list=PLT98CRl2KxKHnlbYhtABg6cF50bYa8Ulo