[Klojum]

I was using a disklabel but after the update Kodi cannot access the USB disc anymore.

I can't imagine that Android will not mount the NTFS drive in Oreo. There is also a chance that (somehow) Oreo is more strict on finding disk errors, and as Linux is already pretty protective by not mounting drives with the slightest of disk errors, things may have changed in that department.

The error showing "Remote share - Path not found or invalid" indicates that something has changed, perhaps you first need to find out what the current mount location is of your NTFS drive in Android. Kodi will be using the Android system for its system mounts.