Import nested folders not working

I have switched OSes from Windows to Linux. On Windows I exported all my workspaces from Yaak. No issues there.

However importing them on Linux gives me the error:

Import failed

error returned from database: (code: 787) FOREIGN KEY constraint failed

Linux distro is KDE Neon.

Yaak is a fresh "install". ie: running AppImage but I tried purging all the configs and cache.

The workspaces are imported, however they are all empty except for one which contains a folder, but nothing else.

I'm not sure if this is part of another problem as I haven't really used Yaak on Linux just yet, but my usual poking around has not revealed any other issues.

Please help! Many thanks.