I was recently working on an ipynb with a lot of data. Dataspell ran out of memory, and proceeded to crash. However, upon reopening Dataspell, the ipynb was empty, and is a 0 bytes on disk (attempting to open gives Unreadable Notebook: ... NotJSONError("Notebook does not appear to be JSON: ''..." error) . Local History shows no past versions saved to which I can revert the ipynb, so it appears all my work is lost? This is despite running over 100 cells successfully before the crash. Is Dataspell not using the .ipynb_checkpoints directory? As nothing was in that directory either. Any help on recovering my notebook would be greatly appreciated!