VSS Event ID:12347 and 1234 The Registry Writer failed to respond to a query from VSS

Hi Folks , 

Getting below error on server with OS :Win2k12 r2 
Log Name:      Application
Source:        VSS
Date:          6/7/2020 7:36:47 AM
Event ID:      12347
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      not mentioned 
Description:
Volume Shadow Copy Service error: An internal inconsistency was detected in trying to contact shadow copy service writers.  The Registry Writer failed to respond to a query from VSS. Check to see that the Event Service and Volume Shadow Copy Service are operating properly, and please check the Application event log for any other events. 

Issue : Backup is getting failed , system writers are missing .Upon restarting cryptsvc all the writers are stable.but still not able to take system state backup.Also tried taking local system state backup which went through successfully.
When i checked Eventvwer found below VSS related events : 
Also could see below event IDs:

Log Name:      Application
Source:        VSS
Date:          6/6/2020 1:01:46 AM
Event ID:      12348
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      Notmentioned 
Description:
Volume Shadow Copy Service warning: VSS was denied access to the root of volume \\?\Volume{61a44f4f-5d9d-11e7-80c8-000d3a02ca79}\. Denying administrators from accessing volume roots can cause many unexpected failures, and will prevent VSS from functioning properly.  Check security on the volume, and try the operation again.