I cannot perform disk expansion on my server. As you can see in the picture I do the operations but I get errors. Help me!
The local datastore on which ESXi is installed, cannot be increased using the GUI, and you need to do this from the command line.
Please see https://kb.vmware.com/s/article/2002461 for details.
Make sure that you have a backup prior to doing this, in case something doesn't work as expected.