After closing and deleting the conversation one cannot send a message from the widget

[sladyn98]

Describe the bug
When I am chatting with an agent and the agent closes and deletes the conversation and I try to send a message via the widget it does not get sent.

To Reproduce
Steps to reproduce the behavior:

1. Go to 'widget'
2. Click on 'Send message'
3. Close the message from the dashboard and delete it
4. Try sending a message from the widget

Expected behavior
It should send a message but doesnt

Screenshots
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Additional context
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