Describe the bug
When trying to take backup with /backup command in version 3.7, errors shows in log that lots of files in ./world/./region does not exists even though the files are in said folder.

To Reproduce
Taking backup with /backup command ether from in game or console

[00:32:36] [AB Active Backup Thread/ERROR]: java.lang.Exception
        at knot//computer.heather.advancedbackups.core.backups.ThreadedBackup.makeZipBackup(ThreadedBackup.java:212)
        at knot//computer.heather.advancedbackups.core.backups.ThreadedBackup.makeBackup(ThreadedBackup.java:138)
        at knot//computer.heather.advancedbackups.core.backups.ThreadedBackup.run(ThreadedBackup.java:82)```



**Versioning (please complete the following information):**
 - OS: [e.g. Debian]
 - Minecraft Version(s): 1.21.4
 - Modloader(s): Fabric
 - Mod Version: 0.16.10

Are you able to provide a full log please?

I've had no luck reproducing this myself, even on a debian installation.
If you could provide more info your specific setup - directory structure, latest.log, server.properties - I might be a little more lucky.

after some more experimenting i finally got a confirmed repro. was a simple fix.

This issue has been closed - fixed in 3.7.1 which has now been pushed to Curseforge and Modrinth.