LT8471 DC/DC converter not working

This is our schematic of 24 V to +/- 12 V buck converter. But we are unable to get the specified output across pin 22 (-12 V), pin 26(+12 V) and even in the ground terminal, we get 24V at all the 3 above mentioned points. We are not sure as to where we could have gone wrong. Can you please help us with this doubt?