Sudden serialized closure error, difficult to fix

[JF-626164]

Hello all,

This morning my application started encountering this issue when attempting to upload files:
Your serialized closure might have been modified or it's unsafe to be unserialized. {"exception":"[object] (Laravel\\SerializableClosure\\Exceptions\\InvalidSignatureException(code: 0): Your serialized closure might have been modified or it's unsafe to be unserialized. at /../../../vendor/laravel/serializable-closure/src/Serializers/Signed.php:83)

In the past when this issue appeared, I would regenerate the keys and then clear the route, cache, config, and view, then the problem would be fixed.

Any idea how to fix this? I've gone through all the recent changes, and I don't see anything that could've caused this.

Edit note: This problem only occurs on my dev server; my local development environment is not encountering this issue.

[henzeb]

How is this serialization been done? Queue?

[JF-626164]

Yes, a Bus::chain() to be exact. I run a number of jobs when this particular import occurs.

[JF-626164]

4 days later the issue is gone. Not certain as to why just yet.

[tamayoac]

what is the fix here? I am also having a issues similar with yours.

[JF-626164]

I don't know what the fix is. I ran composer update and php artisan optimize:clear a ridiculous amount of times and eventually it went away.

[iamdarzee]

composer require laravel/serializable-closure
fixed it for me