Events: preg_match(): Argument #2 ($subject) must be of type string

Running into an odd error that started recently after updating some packages, but it's not clear what caused it.

In my code, I have an event (laravel) that is dispatched after an Event (my object) is created.

EventCreated::dispatch($event);

Now I'm getting an error such as:

preg_match(): Argument #2 ($subject) must be of type string

[https://imgur.com/a/Q9SkN96]

However, there is no second parameter for dispatching.

Below is the EventCreated code for reference.

<?php

namespace App\Events;

use App\Models\Event;
use Illuminate\Broadcasting\Channel;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
use Illuminate\Foundation\Events\Dispatchable;
use Illuminate\Queue\SerializesModels;

class EventCreated implements ShouldBroadcast
{
    use Dispatchable;
    use InteractsWithSockets;
    use SerializesModels;

    public Event $event;

    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct(Event $event)
    {
        $this->event = $event;
        $this->dontBroadcastToCurrentUser();
    }

    /**
     * Get the channels the event should broadcast on.
     *
     * @return Channel|array
     */
    public function broadcastOn()
    {
        return new Channel('events');
    }
}