There is a similar thread, but it did not fix my issue.
Starting system upgrade: apt-get dist-upgrade
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Calculating upgrade... Error!
Some packages could not be installed. This may mean that you have...
New to PM and we are migrating from VMware. I tried to delete a pool from the gui and it just hung, so I did it from cli and it worked fine, except it is still showing in the gui, just greyed out with question marks.