Hello
@nayana,
It seems that the webhook from the Meta is not receiveing, due to which the new chats are not receiving and neither the flow is getting triggered.
Kindly follow these steps, and configure the webhook in Meta Developer again and make sure all the toggle are turned on.
Once, this step is Done, move from configurations to Api Setup in Meta Developer and click the Generate access token button.
Once, these steps are done, go to Pabbly Chatflow, refresh the application and then try sending a message from another number to your Chatflow number and let us know if you were able to see it under your Pabbly Chatflow Inbox.