File backup restore doesn't show files/folders tree

Hello everyone!

We are testing the file backups but when we want to restore them it doesn't show the files/folders tree. This problems occurs in a vembu with ubuntu 18.04 installation. We have tested on hyper-v (windows) and it shows the tree fine.

On the ubuntu install shows this error on the browser: 6restore.controller.js?v=3.8.0:5229 Error!

We have tested with other browsers but it doesn't work.

What do you suggest?

Thank you in advance for your help.

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