New install backup failures - Access Denied

New Duplicacy user and am not able to get a successful backup from Windows 11 PC to Backblaze B2 bucket.

Intalled Duplicacy from administrator Command Prompt, using -install-service, for all users. Checked the running Duplicacy service and is running under local system account.

I have my backup job set to backup C:\

I added -vss switch to Backup Options to use Volume Shadow Service

My backup runs for a couple hours, uploaded abt 37GB worth out of 194GB. The Duplicacy log shows Failed and log shows a number of Access is denied errors. Been reading the forums, but seems other similar causes I should have mitigated by having Duplicacy running as a service, and verified it is running under Local System account. I’m stumped what to try next.

Running backup command from C:\ProgramData/.duplicacy-web/repositories/localhost/0 to back up C:/

Options: [-log backup -storage BackBlaze -threads 4 -vss -stats]

2024-01-01 12:35:10.153 INFO REPOSITORY_SET Repository set to C:/

2024-01-01 12:35:10.153 INFO STORAGE_SET Storage set to b2://Duplicacy

2024-01-01 12:35:10.356 INFO BACKBLAZE_URL Download URL is: https://f000.backblazeb2.com

2024-01-01 12:35:11.019 INFO BACKUP_START No previous backup found

2024-01-01 12:35:11.019 INFO BACKUP_LIST Listing all chunks

2024-01-01 12:35:11.082 INFO VSS_CREATE Creating a shadow copy for C:\

2024-01-01 12:35:14.433 INFO VSS_DONE Shadow copy {84A96AAA-1321-4B2C08B} created

2024-01-01 12:35:14.434 INFO BACKUP_INDEXING Indexing C:\

2024-01-01 12:35:14.434 INFO SNAPSHOT_FILTER Parsing filter file [\?\C:\ProgramData.duplicacy-web\repositories\localhost\0.duplicacy\filters](file://%3f/C:/ProgramData/.duplicacy-web/repositories/localhost/0/.duplicacy/filters)

2024-01-01 12:35:14.434 INFO SNAPSHOT_FILTER Loaded 0 include/exclude pattern(s)

2024-01-01 12:35:14.497 WARN LIST_FAILURE Failed to list subdirectory Documents and Settings/: open [\?\C:\ProgramData.duplicacy-web\repositories\localhost\0.duplicacy\shadow\Documents](file://%3f/C:/ProgramData/.duplicacy-web/repositories/localhost/0/.duplicacy/shadow/Documents) and Settings: Access is denied.

2024-01-01 12:36:24.442 WARN OPEN_FAILURE Failed to open file for reading: open [\?\C:\ProgramData.duplicacy-web\repositories\localhost\0.duplicacy\shadow\hiberfil.sys](file://%3f/C:/ProgramData/.duplicacy-web/repositories/localhost/0/.duplicacy/shadow/hiberfil.sys): Access is denied.

2024-01-01 14:05:31.517 WARN OPEN_FAILURE Failed to open file for reading: open [\?\C:\ProgramData.duplicacy-web\repositories\localhost\0.duplicacy\shadow\System](file://%3f/C:/ProgramData/.duplicacy-web/repositories/localhost/0/.duplicacy/shadow/System) Volume Information{0469e879-a33a-11ee-a}{3808876b-c176-4e48}: Access is denied.

MULTIPLE REPEATED LINES SAME ERROR DIFFERENT SHADOW SYSTEM VOLUME #S

2024-01-01 14:28:40.320 INFO VSS_DELETE The shadow copy has been successfully deleted

2024-01-01 14:29:18.513 INFO INCOMPLETE_SAVE Incomplete snapshot saved to C:\ProgramData.duplicacy-web\repositories\localhost\0/.duplicacy/cache/BackBlaze/incomplete_snapshot

Those are just warnings and Duplicacy keep skipping these system files that can’t be opend in the VSS snapshot. There must be an error of a different kind near the end of the log that caused the backup to fail and an incomplete snapshot to be created.