When an attachment within a portfolio is broken, the portfolio gives an error while viewing / sharing it (resource not found or access denied).
When the broken artifact is deleted and created/uploaded from scratch it is possible to view the portfolio again.
When a portfolio has a couple of artifacts this won't be a problem, but when portfolio's as 100+ artifacts (which sometimes in our cases is) then building artifacts from scratch or finding out which artifact is broken could be a problem.
Idea is to still be able to view the portfolio, but when an artifact is broken this will be shown as a broken image (like you see on webpages when for instance an image isn't correct).
In this way the student is able to share his/her portfolio without error notifications.
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