BackBlaze b2 backup error.

[magic-thomas]

laravel version : v10.8.0
spatie/laravel-backup version : 8.1.8

I get this error.
Copying zip failed because: Unable to write file at location: b2Backup/2023-04-23-12-27-35.zip. Error executing "PutObject" on "https://upmainbucket.s3.us-east-005.backblazeb2.com/b2Backup/2023-04-23-12-27-35.zip"; AWS HTTP error: Client error:PUT https://upmainbucket.s3.us-east-005.backblazeb2.com/b2Backup/2023-04-23-12-27-35.zip` resulted in a 400 Bad Request response:`

laravel app name : b2Backup
b2 bucket name : upmainbucket

I guess the url should be https://upmainbucket.s3.us-east-005.backblazeb2.com/2023-04-23-12-27-35.zip

And I found I can not set folder name.

Is there another way I can go around ?