Laravel-backup: Cleaning up the backups of XXXXX failed | After Upgrading from Laravel 5.8 to 6.X & From PHP 7.3 to PHP 7.4

[mehulboricha]

Using "spatie/laravel-backup": "^6.8"

Error: [Sensitive Fields Hidden]

Exception message: Trying to access array offset on value of type null

Exception trace: #0 XXXXXXXXXXX/public_html/vendor/spatie/laravel-backup/src/Tasks/Cleanup/Strategies/DefaultStrategy.php(47): Illuminate\Foundation\Bootstrap\HandleExceptions->handleError() #1 XXXXXXXXXXX/public_html/vendor/spatie/laravel-backup/src/Tasks/Cleanup/Strategies/DefaultStrategy.php(22): Spatie\Backup\Tasks\Cleanup\Strategies\DefaultStrategy->calculateDateRanges() #2 XXXXXXXXXXX/public_html/vendor/spatie/laravel-backup/src/Tasks/Cleanup/CleanupJob.php(42): Spatie\Backup\Tasks\Cleanup\Strategies\DefaultStrategy->deleteOldBackups() #3 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Support/Traits/EnumeratesValues.php(176): Spatie\Backup\Tasks\Cleanup\CleanupJob->Spatie\Backup\Tasks\Cleanup{closure}() #4 XXXXXXXXXXX/public_html/vendor/spatie/laravel-backup/src/Tasks/Cleanup/CleanupJob.php(54): Illuminate\Support\Collection->each() #5 XXXXXXXXXXX/public_html/vendor/spatie/laravel-backup/src/Commands/CleanupCommand.php(42): Spatie\Backup\Tasks\Cleanup\CleanupJob->run() #6 [internal function]: Spatie\Backup\Commands\CleanupCommand->handle() #7 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(32): call_user_func_array() #8 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Container/Util.php(36): Illuminate\Container\BoundMethod::Illuminate\Container{closure}() #9 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(90): Illuminate\Container\Util::unwrapIfClosure() #10 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Container/BoundMethod.php(34): Illuminate\Container\BoundMethod::callBoundMethod() #11 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Container/Container.php(590): Illuminate\Container\BoundMethod::call() #12 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Console/Command.php(134): Illuminate\Container\Container->call() #13 XXXXXXXXXXX/public_html/vendor/symfony/console/Command/Command.php(255): Illuminate\Console\Command->execute() #14 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Console/Command.php(121): Symfony\Component\Console\Command\Command->run() #15 XXXXXXXXXXX/public_html/vendor/spatie/laravel-backup/src/Commands/BaseCommand.php(16): Illuminate\Console\Command->run() #16 XXXXXXXXXXX/public_html/vendor/symfony/console/Application.php(1001): Spatie\Backup\Commands\BaseCommand->run() #17 XXXXXXXXXXX/public_html/vendor/symfony/console/Application.php(271): Symfony\Component\Console\Application->doRunCommand() #18 XXXXXXXXXXX/public_html/vendor/symfony/console/Application.php(147): Symfony\Component\Console\Application->doRun() #19 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Console/Application.php(93): Symfony\Component\Console\Application->run() #20 XXXXXXXXXXX/public_html/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php(131): Illuminate\Console\Application->run() #21 XXXXXXXXXXX/public_html/artisan(37): Illuminate\Foundation\Console\Kernel->handle() #22 {main}

[freekmurze]

What is the full error message?

I'm guessing this is related to cached config. Did you clear the config cache?

[mehulboricha]

I have set up an email kind of thing whenever an exception occurs. This was the content of the email.

I have already cleared the config cache but this is still happening.

Exception message: Trying to access array offset on value of type null

PS: Forgot to add the exception message

[mehulboricha]

I am pretty sure that this is related to upgrading to PHP 7.4

Souce: https://www.php.net/manual/en/migration74.incompatible.php

Section: Array-style access of non-arrays

[freekmurze]

Strange, our test suite does run ok on PHP 7.4
https://github.com/spatie/laravel-backup/actions/runs/55185565

[mehulboricha]

Can you guide me on how to get into the root of this and find what is causing the issue? Is the version of laravel backup I am using correct?

Using "spatie/laravel-backup": "^6.8" | in composer.json

[freekmurze]

Unfortunately I don't have the time to look into specific projects. You could try getting some help on Laravel.io or the Laracasts forum.

[mehulboricha]

Okay no problem. Just tell me is the version of laravel-backup I mentioned earlier is compatible with PHP 7.4 or not?

[freekmurze]

Yes

[freearhey]

I think this issue is related: #981

And the problem is most likely in config/backup.php. At least that's what I had. It was necessary to update all the keys in the config as it says here: https://github.com/spatie/laravel-backup/blob/master/UPGRADING.md

[mehulboricha]

Hey there,

A few days back I replaced the backup.php from the original source. It worked. Thanks :D

[Udsupun]

Check whether all the keys in the config/backup.php file is in snake_case.
ex. deleteOldestBackupsWhenUsingMoreMegabytesThan
should change to delete_oldest_backups_when_using_more_megabytes_than