ErrorException: Array to string conversion in /app/vendor/laravel/framework/src/Illuminate/Mail/Mailable.php

問題 code

$this->attachFromStorageDisk('s3', 'public/xxx/index.htm'));

error stack

#0 /app/vendor/laravel/framework/src/Illuminate/Mail/Mailable.php(844): Illuminate\Foundation\Bootstrap\HandleExceptions->handleError()
#1 /app/vendor/laravel/framework/src/Illuminate/Collections/Collection.php(1512): Illuminate\Mail\Mailable->Illuminate\Mail\{closure}()
#2 /app/vendor/laravel/framework/src/Illuminate/Collections/Traits/EnumeratesValues.php(840): Illuminate\Support\Collection->Illuminate\Support\{closure}()
#3 [internal function]: Illuminate\Support\Collection->Illuminate\Support\Traits\{closure}()
#4 /app/vendor/laravel/framework/src/Illuminate/Collections/Arr.php(717): array_filter()
#5 /app/vendor/laravel/framework/src/Illuminate/Collections/Collection.php(358): Illuminate\Support\Arr::where()
#6 /app/vendor/laravel/framework/src/Illuminate/Collections/Traits/EnumeratesValues.php(842): Illuminate\Support\Collection->filter()
#7 /app/vendor/laravel/framework/src/Illuminate/Collections/Collection.php(1517): Illuminate\Support\Collection->reject()
#8 /app/vendor/laravel/framework/src/Illuminate/Mail/Mailable.php(845): Illuminate\Support\Collection->unique()
#9 /app/app/Mail/CommitMail.php(50): Illuminate\Mail\Mailable->attachFromStorageDisk()

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