Update Encrypter.php (#42370)
Update Encrypter.php (#42370)

* Update Encrypter.php

enforce decrypt payload to string, fix for below error

`base64_decode(): Passing null to parameter #1 ($string) of type string is deprecated in vendor/laravel/framework/src/Illuminate/Encryption/Encrypter.php on line 208`

* Update Encrypter.php

Co-authored-by: Taylor Otwell <5d74ae093a16a00e5af127763f2dc7e13988f162@laravel.com>
morrislaptop/framework,hafezdivandari/framework,leo108/laravel_framework,arturock/framework,JamesForks/framework,lucasmichot/framework,driesvints/framework,morrislaptop/framework,lucasmichot/framework,leo108/laravel_framework,laravel/framework,laravel/framework,JamesForks/framework,arturock/framework,hafezdivandari/framework,driesvints/framework,arturock/framework