Ubuntu 20.04 LTS: Automounting of bitlocker disks stopped working

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I'm using Ubuntu 20.04 LTS. henever I plug in an external USB drive encrypted with Bitlocker, an error message window pops-up saying "No .Filesystem or .Encrypted interface on D-Bus object".

When I mount the disk manually:

sudo mkdir -p /mnt/bitlocker
sudo mkdir -p /mnt/bitlockermount
sudo dislocker /dev/sdc1 -uPASSWD -- /media/bitlocker
sudo mount -o loop /media/bitlocker/dislocker-file /media/bitlockermount

everything works fine. Auto mounting works well on other distros, e.g. Fedora and Debian 11. Could you please help figuring out what the root cause is?

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