Looks like your problem is with lvmetad, a metadata caching manager for
logical volume manager (LVM).
Here's one solution on the Ubuntu forums:
https://askubuntu.com/questions/767140/lvmetad-is-not-active-yet
I would recommend studying up on the lvmetad and lvm man pages a little bit
before attempting to make the change recommended by that Ubuntu user. Make
sure you know what you are doing, and don't harm any of your drives or
partitions. And of course do a complete backup before you change anything.
