javascript - "Object of class SymfonyComponentHttpFoundationParameterBag could not be converted to string" - What does this error mean and how can I fix it

I'm currently creating an application using the Laravel framework and Vue JS.

I have a lot of different 'statuses' e.g. CEO, COO, CFO, Accountant etc. and they all have an ID and a stage_id. My end goal is to use their unique IDs to get their stage IDs and then update their stage IDs to be the same

IMPORTANT: THE $request coming in is in the form of an array of the various status IDs so it could be something like [1,4,6] or even []

This is my controller function:

    public function updateStatuses(Request $request, Stage $stage)
    {

    foreach($request as $statusId) {
        Status::forClient()->findOrFail($statusId)->update([
            'stage_id' => $stage->id,
        ]);
    }

    Status::forClient()->all();
    return Status::all();
    }
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My axios request:

        changeStatusIds() {
        var self = this;
        axios.put(window.routes["statusroute"].replace('{stage}', this.selectedStage.id), this.selectedStatuses)
            .then(function (response) {
                console.log(response);
                self.allStatuses = response.data;
            })
            .catch(function(error){
                console.error(error);
                if (!!error.response) console.log(error.response);
            });
    },
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However, I keep getting the error "Object of class Symfony\Component\HttpFoundation\ParameterBag could not be converted to string" which I've never come across before and can't seem to debug. Given my current code, how can I fix this?

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