Launching apps and desktops got black screen after applying fslogix policies

We can try the following steps to fix:1-downgrade fslogix version to 2.9.7838.442632-add following registry per:https://learn.microsoft.com/en-us/fslogix/reference-configuration-settings?tabs=profiles#roamrecyclebin

Registry Hive: HKEY_LOCAL_MACHINE

Registry Path: SOFTWARE\FSLogix\Apps

Value Name: CleanupInvalidSessions

Value Type: DWORD

Enabled Value: 1

Disabled Value: 0 (default)

In cases where a user's session terminates abruptly, the VHD(x) mounted for the user's profile is not properly detached and the user's next login may not successfully attach their VHD(x) container. Enable this setting and FSLogix will attempt to clean up these invalid sessions and allow a successful sign-in. This setting affects both Profile and ODFC containers.

Registry Hive: HKEY_LOCAL_MACHINE

Registry Path: SOFTWARE\FSLogix\Apps

Value Name: RoamRecycleBin

Value Type: DWORD

Enabled Value: 1 (default)

Disabled Value: 0

When enabled, this setting will create a redirection for the user's specific Recycle Bin into the VHD(x) container. This allows the user to restore items regardless of the machine from where they were deleted.

Registry Hive: HKEY_LOCAL_MACHINE

Registry Path: SOFTWARE\FSLogix\Apps

Value Name: VHDCompactDisk

Value Type: DWORD

Enabled Value: 1 (default)

Disabled Value: 0

When enabled, this setting will attempt to compact the VHD disk during the sign-out operation and is designed to automatically decrease the Size On Disk of the user's container(s) depending on a pre-defined threshold. For more information, see the VHD Disk Compaction documentation.