Why won't Links to other spreadsheets automatically update

P

pfdubz

When I open a linked spreadsheet and select "Update" I always get a message
that links cannot be established and a selection to edit links. The links
are correct and values are updated when I select "Update Values". However,
Edit Links still lists the links as unknown. I can change this by updating
(again). But the link will not hold after saving and the next time I open
the sheet, I have to do it all over again!
 
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