[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.

Code:
  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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