I can reliably reproduce the issue after creating an encrypted Private
directory with ecryptfs-setup-private (see
https://help.ubuntu.com/community/EncryptedPrivateDirectory#Setup_Your_Encrypted_Private_Directory).

The problem stems from the fact that the home interface doesn't allow
reading/writing to hidden folders in $HOME, and the ~/Private folder is
actually backed by encrypted data in ~/.Private.

This is not specific to chromium, other strictly confined snaps using
the home interface would be similarly affected.

Interestingly, saving a file to the folder still works, despite the
error and the fact that the file dialog is unable to show the contents
of the folder.

** Changed in: chromium-browser (Ubuntu)
       Status: New => Confirmed

** Summary changed:

- [snap] Permission denied on Private folder
+ [snap] Permission denied on Private encrypted folder

** Changed in: chromium-browser (Ubuntu)
   Importance: Undecided => Low

** Also affects: snapd (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1848919

Title:
  [snap] Permission denied on Private encrypted folder

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