Plone 4.3.15 locates in /keti with 100s folders containing 4000s files (not dexterity content type).
I get a fresh installed Plone 5.0.7, then copy blobstorage and Data.fs from 4.3.15 to 5.0.7. The following migration seems ok as https://pastebin.com/bZDD8DR5
But when I try to open folders to view files list(links as http://192.168.142.158:8080/keti/xjieti/2009xjt/xxsx), it fails with error as https://pastebin.com/RxjazVQu. Curiously I can view or download a file within the folder through straightforward links such as http://192.168.142.158:8080/keti/xjieti/2009xjt/xxsx/2009X098.rar/at_download/file or http://192.168.142.158:8080/keti/xjieti/2009xjt/xxsx/2009X098.rar/view.
I find that the view is ok when there are folders and files in a folder. Error appears when only files exist.
How can I get this done? After this, I plan to upgrade my existing content to use Dexterity. Thank you very much.