400 Bad Request on Nextcloud

Hi everyone, I have a Raspberry Pi 4 running OMV5, which I used to install Docker and Portainer. I have set up a linuxserver/nextcloud container using the docker-compose script, and it was working correctly. I created an account, logged in, and uploaded some files.

However, overnight I am now getting the following message:

400 Bad Request

Request Header Or Cookie Too Large

I’m getting this when I try to access Nextcloud with Chrome at

Nextcloud loads correctly when I point Edge to the same address.

I have installed Bitdefender which I believe issues its own certificates when accessing an SSL site without a proper domain name.

Any idea how to get this working in Chrome again? I have access to the Nextcloud admin settings through Edge.

Clearing cookies seems to have done the trick. Nextcloud is loading in Chrome again.