windows - bcdedit.exe refuses to open system store

Looks like my BCD is somehow broken but I can't figure out what is wrong. The system boots just fine but it prevents windows from installing updates:

MoSetupPlatform: Opening BCD store...
CDlpActionDiskSpaceReq::CalculateRequiredDiskSpaceInstallReq(1752): Result = 0x8007001F

I'm running Windows 10 on a MacBook (bootcamp), it uses EFI partition table. When I run bcdedit /enum in elevated prompt I get

The boot configuration data store could not be opened.
A device attached to the system is not functioning.

When I try to open store directly, it opens just fine:

B:\>bcdedit.exe /store B:\EFI\Microsoft\Boot\BCD /enum

Windows Boot Manager
--------------------
identifier              {bootmgr}
device                  partition=B:
path                    \EFI\Microsoft\Boot\bootmgfw.efi
description             Windows Boot Manager
locale                  en-US
inherit                 {globalsettings}
default                 {default}
resumeobject            {8b3fea76-03c8-11e6-8f47-dc08058a457d}
displayorder            {default}
toolsdisplayorder       {memdiag}
timeout                 30

Windows Boot Loader
-------------------
identifier              {default}
device                  partition=C:
path                    \WINDOWS\system32\winload.efi
description             Windows 10
locale                  en-US
inherit                 {bootloadersettings}
recoverysequence        {8b3fea78-03c8-11e6-8f47-dc08058a457d}
displaymessageoverride  Recovery
recoveryenabled         Yes
isolatedcontext         Yes
allowedinmemorysettings 0x15000075
osdevice                partition=C:
systemroot              \WINDOWS
resumeobject            {8b3fea76-03c8-11e6-8f47-dc08058a457d}
nx                      OptIn
bootmenupolicy          Standard

Does Windows store actual BCD somewhere else? How does windows know on which partition and path to look for system BCD store?

How do I diagnose what is wrong with my BCD store?

update: forgot that I boot using refind bootloader which likely boots bootmgfw.efi