Q:

Bitlocker volume not mounting after upgrade to 20.04

I received the notification that there is a new release and I upgraded to Focal Fossa.  Everything seems to work fine till now, except that I lost access to the Bitlocker encrypted Windows partition. 
I checked and the dislocker package is still installed; /etc/fstab hasn't changed, the dislocker-file is present. 
When I try to mount it with sudo mount -o loop /mnt/OS/dislocker-file /mnt/Windows I get:

mount: /mnt/Windows: wrong fs type, bad option, bad superblock on /dev/loop13, missing codepage or helper program, or other error. 

My fstab file entries are as follows:

/dev/nvme0n1p3  /mnt/OS fuse.dislocker  recovery-password=myrecoverypassword 0 0
/mnt/OS/dislocker-file /mnt/Windows  auto    nofail,x-gvfs-show,x-gvfs-name=C:   0   0

I checked the logs and am seeing a series of errors on a number of logical blocks:

blk_update_request: I/O error, dev loop13, sector 469239680 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev loop13, logical block 58654960, async page read

How do I solve this issue? 

A:

I managed to solve this problem by removing the dislocker package that was installed with apt:
sudo apt remove dislocker

Followed by installing the version from Github according to this post.  The steps to do this:
sudo apt install git gcc cmake make libfuse-dev libmbedtls-dev ruby-dev
git clone https://github.com/Aorimn/dislocker.git
cd dislocker
cmake . 
make
sudo make install

Then I unmounted the dislocker-file with sudo umount /mnt/OS and remounted all partitions according to the /etc/fstab file with sudo mount -a. 
Problem solved.