Custom Topic and Conversational Plugin not working in Microsoft Copilot Studio

I've created two Copilots 1 and 2. Only 2 is tied to a web page for data source. I've created a custom topic and a conversational plugin for both copilots. In the topic/plugin, I've added a Generative answers node after the trigger phrase node. In the generative answers node, I do not add any data source but instead add my context prompt inside the properties section of the node under the custom instructions section. Also, in the node, I mark the input as Activity.Text

I've tested this topic/plugin in both copilots but after providing the input to copilot, it does not reply back with anything and when I look at the flow of the topic/plugin, it is marked as completed.

Additional context, in my chat with copilot - I provide it details of a random project and in the context prompt, that I already provided, I ask the copilot to extract the facts from my message and reply back in a professional style.

Can anyone please guide me and help me troubleshoot this problem?