Unable to initialize sync journal on ubuntu nextcloud-client

Ubuntu 18.04.1 LTS (GNU/Linux 4.15.0-43-generic x86_64)
nextcloud 13.0.8snap1 10314 stable

Ubuntu 18.10 (GNU/Linux 4.18.0-13-generic x86_64)
nextcloud-client 2.3.3+gitab40efe 10 stable

With my windows client everything syncs fine, but I get an “Unable to initialize a sync journal” error when trying to sync.

Steps attempted so far:
Restarted server and client
Removed all ._sync* files, and reinstalled
Changed permissions to the client-side files and folders with chmod -R a+rwx
Syncing only specific subdirectories

The client log doesn’t reveal anything
What are some good next steps to solve this?