Resolved Cannot Build Addressables : Could Not Find a part of the path "".

I'm stumbling upon this error after changing a few options in my addressables group. When I try to build them, it goes through the whole process of calculating dependencies, which takes over an hour, then stops when it reaches the step where it writes the files with the following error :

Could not find a part of the path ""
UnityEditor.AddressableAssets.Settings.AddressableAssetSettings:BuildPlayerContent()

I reverted the options to what they were, and I'm still facing this issue. I cleaned and rebuilt, and I can't get addressables to work anymore. It happens on other computers too, so I'm guessing it's linked to something null in one of the addressables, but I can't find which one.

Are there any tips or direction as to how to debug this ?

 

I ended up "fixing" this issue by removing and re-creating my addressables groups in the exact same way they were before.

I'm still not sure what the problem was.