Improve error message for image import failure

[fabiencastan]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.02%. Comparing base (0e46cbe) to head (dbf9bc3).
⚠️ Report is 25 commits behind head on develop.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2887   +/-   ##
========================================
  Coverage    79.02%   79.02%           
========================================
  Files           51       51           
  Lines         6856     6856           
========================================
  Hits          5418     5418           
  Misses        1438     1438           

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