the title gives it basically away already.
I recently tried to migrate the database of my website (Plone 5.2.2) from Python 2.7 to Python 3.6, according to the official documentation:
Zodbupdate concludes the conversion of the Data.fs successfully and the website is working together with all text-content on the pages.
HOWEVER all uploaded Pictures, Documents, etc. are broken and cannot be opened anymore?
I spent a significant amount of time on the internet looking for a similar case, without much success.
Can anyone give me a clue?