FastBack fails when worlds use Voxy - cannot index storage/LOCK

[1ofx9]

Minecraft: 1.21.10
Loader: Fabric
FastBack: 0.29.0

logs:

[17:47:19] [Server thread/ERROR]: [STDERR] error: open("voxy/89287d747831ecfeb704425d9e6293a3/storage/LOCK"): Permission denied
[17:47:19] [Server thread/ERROR]: [STDERR] error: unable to index file 'voxy/89287d747831ecfeb704425d9e6293a3/storage/LOCK'
[17:47:19] [Server thread/ERROR]: [STDERR] fatal: adding files failed

full log : https://mclo.gs/ANOvKg7

If I disable Voxy, FastBack backups work normally. As soon as Voxy is enabled again, the backup fails every time. Automatic backups trigger correctly, but they fail with the same error.

[1ofx9]

Voxy(0.2.6-alpha) by Cortex link

[tcK1]

Not sure what the issue is, but to circumvent it I've ignored the .voxy folder, by putting an empty .gitignore folder inside it.