[Solved] Order not placed in magento2

jafar pinjar Asks: Order not placed in magento2
Not able to place the order in magento2 checkout.

getting below error when place order button is clicked.

  An error occurred on the server. Please try to place the order again.

The request to rest/default/V1/carts/mine/payment-information

is showing 400 Bad request.

Can anyone help me with this issue please. Thanks

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