Custom Lovelace cards "does not exist" error in HA 0.118.1

I updated today my HA to the latest version 0.118.1. Since the update all my custom Lovelace cards are gone. All custom modules are up to date and they are correctly set up as Lovelace resources. I restarted HA several times. Does anyone have a hint what is wrong?

My HA setup:

System Health

Home Assistant Core Integration

version: 0.118.1
installation_type: Home Assistant OS
dev: false
hassio: true
docker: true
virtualenv: false
python_version: 3.8.6
os_name: Linux
os_version: 4.19.127-v7
arch: armv7l

Home Assistant Cloud

logged_in: false
can_reach_cert_server: ok
can_reach_cloud_auth: ok
can_reach_cloud: ok

host_os: HassOS 4.17
update_channel: stable
supervisor_version: 2020.11.0
docker_version: 19.03.12
disk_total: 13.9 GB
disk_used: 5.6 GB
healthy: true
supported: true
board: rpi3
supervisor_api: ok
version_api: ok
installed_addons: Samba share (9.3.0), Duck DNS (1.12.4), Mosquitto broker (5.1), File editor (5.2.0), ESPHome (1.15.3), Zigbee2mqtt (1.16.1), Terminal & SSH (8.9.1)


dashboards: 3
mode: auto-gen
resources: 5

I have a similar problem using chrome but ms-edge still works

Yes, you are right. I cleared my cookies on the page and everything came back as normal. Strange though.

I loaded the HACS integration to see if it would load the custom components. I only loaded it and all my custom components work fine!!