# Troubleshooting

## 1. When creating a channel, I get a message that reads "Unable to verify address." <a href="#id-1" id="id-1"></a>

This error occurs when the link\_url you’ve entered is not in the default URL form. Do not enter an address at all or enter the correct address.

## 2. I can’t upload my image. <a href="#id-2" id="id-2"></a>

For security reasons, you can’t upload image types that aren’t allowed.

In **Dashboard > Settings > Allowed Image Upload Types**, enter the MIME TYPE to be allowed such as image/webp, image/heic, image/heic-sequence, image/heif, image/heif-sequence, image/svg+xml ,image/bmp, image/gif, image/jpeg, image/png.

Object Storage must be enabled.

* You can use it after integrating with [Object Storage](https://www.ncloud.com/product/storage/objectStorage) product.

## 3. All messages are received. <a href="#id-3" id="id-3"></a>

If you are subscribed to various channels, you receive messages from all those channels.\
You can distinguish them through channelId.

```javascript
nc.bind('onMessageReceived',function(channel, message) {
// If you are subscribed to various channels, this is where you receive messages from all those channels.
// Channels to be shown to customers need to be distinguished through channel.
if(channel == current_channel) {
console.log(message);
}
});
```