JsonWrapper does not work in pivot field belongstomany

[rvalenzuelaferrada]

            BelongsToMany::make('Items')
                ->fields(function () use ($inputs) {
                    return [
                        JsonWrapper::make('answers', $inputs)
                    ];
                }),

exception: "ErrorException"
file: "/home/vagrant/Code/Projects/larawix/vendor/laravel/framework/src/Illuminate/Support/Str.php"
line: 449
message: "Array to string conversion"