[Bug]: League\Flysystem\Filesystem::directoryExists(): Argument #1 ($location) must be of type string, null given

[Jacobtims]

What happened?

When old email logs get pruned and they don't have any attachments to delete, I get the following error:

TypeError
League\Flysystem\Filesystem::directoryExists(): Argument #1 ($location) must be of type string, null given, called in /vendor/laravel/framework/src/Illuminate/Filesystem/FilesystemAdapter.php on line 225

The error occurs in the Email model, because the $folderPath variable is null:

/vendor/rickdbcn/filament-email/src/Models/Email.php in RickDBCN\FilamentEmail\Models\Email::RickDBCN\FilamentEmail\Models\{closure} at line 94

How to reproduce the bug

1. Enable the email log prune
2. Ensure that an email log without attachments can be pruned
3. When the email log is deleted, an error appears in the logs

Package Version

1.6.1

PHP Version

8.2.23

Laravel Version

10.48.20

Which operating systems does with happen with?

macOS, Linux

Notes

No response