Error in render: "TypeError: Cannot use 'in' operator to search for '' in [object]

I am using vue.js and laravel 5.8. In my commenting system like youtube,

I want to show user's profile image.

If user doesn't have a profile image, I want to show avatar.

I have many users, so I want to show multiple profile images based on id.

Now I got this error.

"TypeError: Cannot use 'in' operator to search for '' in 1571585278.jpg"

According to this console errors, I am fetching profile image (1571585278.jpg). But I cannot show it, because 'in' operator is not available.

Also, I cannot show user's avatar. Though I used if method.

<div else class="user" >
        <avatar :username="comment.user.name" :size="45"></avatar>
 </div>

I am storing images in public/uploads.

How to fix Error in render: "TypeError: Cannot use 'in' operator to search for '' in ?

user.php

protected $with = ['profile'];

comment.vue

<template>
<div>
    <div class="reply-comment" >
        <div class="user-comment">
                <div class="user" v-if="comment.user.profile.image && comment.user.profile.image.length > 0">
                    <span :v-for="(item, index) in comment.user.profile.image">
                        <img :src="'/uploads/' + item.comment.user.profile.image">
                    </span>
                </div>
                <div else class="user" >
                    <avatar :username="comment.user.name" :size="45"></avatar>
                </div>
            <div class="user-name">
                <span class="comment-name"><a :href=" '/user/' + 'profile' +'/'+ comment.user.id + '/'  "></a></span>
                <p></p>
            </div>
        </div>
    </div>
    <div class="reply">
        <button @click="addingReply = !addingReply" class="reply-button" :class="{ 'red' : !addingReply, 'black' : addingReply }">
            
        </button>
    </div>
    <div class="user-reply-area" v-if="addingReply">
        <div class="reply-comment">
            <div  v-if="!auth">
                <button @click="addReply" class="comment-button">Reply</button>
                <input v-model='body' type="text">
            </div>
        </div>
    </div>
     <replies ref='replies' :comment="comment"></replies>
</div>
</template>

<script>
import Avatar from 'vue-avatar'
import Replies from './replies.vue'
export default {
    components: {
        Avatar,
        Replies
    },
    data() {
        return {
            body: '',
            addingReply: false,
            auth: '',
            item: '',
            index: ''
        }
    },
    props: {
        comment: {
            required: true,
            default: () => ({})
        },
        post: {
            required: true,
            default: () => ({})
        }
    },
    methods: {
        addReply() {
            if(! this.body) return
            axios.post(`/comments/${this.post.id}`, {
                comment_id: this.comment.id,
                body: this.body
            }).then(({data})=> {
                this.body = ''
                this.addingReply = false
                this.$refs.replies.addReply(data)
            })
            .catch(function (error) {
        console.log(error.response);
        });
     }
    }
}
</script>

via Chebli Mohamed