Cannot upgrade to Catalina - FileVault Encrypting

Thanks for your reply.

Is there a way to see the progress of the encryption?

A couple of time when on battery power and I go to the FileVault settings, it says encryption paused, plug into power to resume encryption, so I plug into power and then starts encrypting, says 1 hour remaining, 2 hours remaining, then says complete, this over a 30 second period.

Every other time I view the settings, it just says key is set and turned on for Macintosh HD, no progress details.

Its a 1TB SSD that was from the apple factory, It has 880GB used.

fdesetup status:

FileVault is On.

FileVault master keychain appears to be installed

diskutil cs list | grep 'Conversion Progress':

(blank)

diskutil cs list:

No CoreStorage logical volume groups found

diskutil list:

/dev/disk0 (internal, physical):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      GUID_partition_scheme                        *1.0 TB     disk0

   1:                        EFI EFI                     209.7 MB   disk0s1

   2:                 Apple_APFS Container disk1         880.3 GB   disk0s2

   3:       Microsoft Basic Data BOOTCAMP                120.0 GB   disk0s3

/dev/disk1 (synthesized):

   #:                       TYPE NAME                    SIZE       IDENTIFIER

   0:      APFS Container Scheme -                      +880.3 GB   disk1

                                 Physical Store disk0s2

   1:                APFS Volume Macintosh HD            781.9 GB   disk1s1

   2:                APFS Volume Preboot                 44.3 MB    disk1s2

   3:                APFS Volume Recovery                510.4 MB   disk1s3

   4:                APFS Volume VM                      1.1 GB     disk1s4

Unable to turn off FileVault - grayed out

Unable to perform a time machine backup - encryption in progress

Unable to install OS update - encryption in progress

I went from Yosemite -> High Sierra rapidly in a couple OS update rounds.

Only updated as I could no longer connect to iOS13(Backup/Sync) with Yosemite, also I am planning on a new macbook pro, so thought I would update, backup and restore all on Catalina versions.

I tried safe boot and Turn off filevault is still grayed out.

If I boot on battery power I can get the encryption to pause, and plugging into resumes and it says it finishes, but still can't update or backup.

I have backed up all my important data manually and am ready for a new macbook, that I will start fresh on(not time machine restore), it seems I have a gathered a lot of apps that no longer function in later OSX's

Just trying to hold out for Macbook pro 16" announcement

Nope, but the 16" MBP was announced yesterday, that should fix it.

I accidentally tried to install Catalina again yesterday, it failed, but with a different error, I might try again properly and see what it says.

This MBP will be factory reset and sold once I get the 16"

Cheers, thanks for your help, if you think of anything else, I will be limping along for a bit longer yet