AerError: 'unknown instruction Updated +Created
You get an error like this if you forget to call qiskit.transpile():
qiskit_aer.aererror.AerError: 'unknown instruction: QFT'
Related: quantumcomputing.stackexchange.com/questions/34396/aererror-unknown-instruction-c-unitary-while-using-control-unitary-operator/35132#35132