I installed some Vanilla Tweaks datapacks, and it stopped backing up and gave me the below errors:

java.lang.NullPointerException at ratismal.drivebackup.util.FileUtil.generateFileList(FileUtil.java:246) at ratismal.drivebackup.util.FileUtil.generateFileList(FileUtil.java:247) at ratismal.drivebackup.util.FileUtil.generateFileList(FileUtil.java:247) at ratismal.drivebackup.util.FileUtil.generateFileList(FileUtil.java:213) at ratismal.drivebackup.util.FileUtil.makeBackup(FileUtil.java:106) at ratismal.drivebackup.UploadThread.doSingleBackup(UploadThread.java:270) at ratismal.drivebackup.UploadThread.run(UploadThread.java:196) at java.base/java.lang.Thread.run(Unknown Source)

Removing the datapacks seems to have fixed the issue. The datapacks have spaces in their names, so this may be the cause.

I am not able to reproduce this issue. Are you able to provide more details?

This issue has been stale for over 3 months now, so I'll have to close it but if you experience it again please open another issue.