[Bug]: No response in any channel

Is there an existing issue for this?

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[X] I used OpenCUI on Google Chrome

Current Behavior

先在 Debug 测试 MakeReservation skill，通过之后，将 chatbot deploy 到 Messenger & WhatsApp，点击 Clear Cache

在成功配置了 webhook 后，在 Messenger 给 bot 发送 “hi” 之后，能收到回复

再发送 "I want to book a table" 后，bot 没有回复，对话如下图所示

log 中有下列报错：

ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] 
in context with path [] threw exception [Request processing failed; 
nested exception is java.util.NoSuchElementException: List is empty.] with root cause 
java.util.NoSuchElementException: List is empty.
    at kotlin.collections.CollectionsKt___CollectionsKt.first(_Collections.kt:212)
        at me.restaurant.tableReservation.MakeReservation$SlotInitduration_Action$1.invoke(me_restaurant_tableReservation.kt:344)

在 WhatsApp 重复上述操作，有相同的报错

Log

Expected Behavior

期望 bot 回复："How many people will you need the reservation for?"

Use Case

Steps To Reproduce

在 WhatsApp 或者 Messenger 中给 bot 发消息

Label of org.project

OpenCUI Link

https://build.opencui.io/org/me.restaurant/agent/tableReservationApp/en/test_case

Test Case

No response

Additional information

最近一次 Messenger 能 work 的日期是：2月16日 14:46，WhatsApp ：2月15日 11:14

framely / community

[Bug]: No response in any channel #824