Existing leveldb folder cannot be opened

I have deleted my `google-chrome` folder on Ubuntu, unaware that it contains some important information from an extension.

I have tried to recover my data using TestDisk.
So, I have copied the recovered files to an external drive and tried to access the leveldb folder, but that results in an `Invalid argument: /path/leveldb: does not exist error`, as shown in [this post here](https://github.com/wbolster/plyvel/issues/123):

What causes this issue? and how can I read the data from this Schrodinger's leveldb folder?