What does it mean when an Apple report says: unresponsive before sampling and idle work queue threads omitted

This issue - iCloud icon on Apple System Preferences beach balling

after clicked and panel notes 'iCloud loading...' but nothing happens.

All other icons are as responsive as always.

I did in dealing with an scam of an iCloud popup which would not

close and kept returning Trash these items:

-the caches folder at: ~/Library/folder

-the iCloud folder in the ~ /Library/ApplicationsSupport/folder

and

- the MobileMeAccounts.plist in the ~/Library/Preferences/folder

then I Restarted the computer (which I understand

puts back in default the items trashed.

I believe that it is since then that the beach balling must have

been happening, I know for sure that this procedure happen

on Dec 3, 2017 and the last uploaded picture (according

to the preferences I had for iCloud before the procedure)

was on Nov 30, 2017.

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The Apple Report which is generated from force quitting

System Preferences has items which seem related which

are related to the problem but I don't understand there

meaning. The report says:

"Note: unresponsive for 14 seconds before sampling"

"Note: 2 idle work queue threads omitted"

Please, what is the meaning of these notes in plain English?

I sense that if I understood what is being noted I might at least

have a clue in regards to the actual source of the problem that

I am experiencing with the beach balling and having to force

quite to exit SysPref after I click the iCloud icon.

Other than not automatically uploading photo stream there

seem to be not problems at iCloud Photos nor MacPhotos,

nor iCloud Drive.