vdirsyncer error: Remote end closed connection without response

[lokesh-krishna]

This issue might not be with radicale-decsync but I dunno where else I could look for help for my uncommon setup. I use DecSyncCC on my Android device and sync it with my laptop using Syncthing. On my laptop, I use Radicale with radicale-decsync to make my contacts, calendars and tasks available to vdirsyncer which then lets me access them using a bunch of tools.

I only just started exploring DecSync and while things went swimmingly on Android, I'm having trouble with the syncing on my laptop.

The following is the error I'm getting when running vdirsyncer sync after setting it up:

Syncing calendars/calendars-655c997b-5938-499b-9348-e26bbaf26a85
Syncing contacts/contacts-3e3ca063-d88c-4cd7-9141-69eb2ca57602
Syncing tasks/tasks-a2e77698-f5c0-4e17-98f1-b16ba78909bd
error: Unknown error occurred for tasks/tasks-a2e77698-f5c0-4e17-98f1-b16ba78909bd: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))
error: Use `-vdebug` to see the full traceback.
error: Unknown error occurred for contacts/contacts-3e3ca063-d88c-4cd7-9141-69eb2ca57602: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))
error: Use `-vdebug` to see the full traceback.
error: 2 out of 6 tasks failed.

Here is the output with -vdebug: debug

Is there some obvious part of this setup that I've missed? Also attaching my vdirsyncer config file in case it can be of any use: config