android chat sdk can't send attachments [Attachments not supported]

// classic-web-widget-sdks
dependencies {  
implementation group: 'com.zendesk', name: 'chat', version: '3.4.0'  
implementation group: 'com.zendesk', name: 'messaging', version: '5.4.0' 
}

Chat.INSTANCE.init(this, "xxx")

btn.setOnClickListener {
    val chatConfiguration = ChatConfiguration.builder()
.withPreChatFormEnabled(false)
.build()

   MessagingActivity.builder().withEngines(ChatEngine.engine())
.show(context, chatConfiguration)
}

with code above, I can send text ,but can't send image.

get error on SendFileRequest :

Response{protocol=h2, code=403, message=, url=https://widget-mediator.zopim.com/client/widget/upload?ts=1699345460102&__messageID=1699345460102&__socketID=1ruv7zdzc9x9uth0f549o3}

dashboard file sending  is enable  and mimetype is satisfied  

iOS sdk works