Are both the following sentences correct?
He is not coming to school due to he fell sick last night.
He is not coming to school because he fell sick last night.
They are not interchangeable. “Due to” has to be followed by a noun phrase and “because” – by a clause (which means there will be a verb after it). So in your examples, the second sentence is correct. A correct example with “due to” will be: “His company’s success was mostly due to the excellent performance of the manager.“
Source : Link , Question Author : william007 , Answer Author : fluffy