“The opponents say: if Mirza sahib had not made this claim to being Messiah and Mahdi, the Muslims would generally have accepted him as the mujaddid of the time, but these claims have prevented us from accepting him as mujaddid.”

The claim of “mujaddid” mentioned here is obviously what he had claimed to be before claiming to be Promised Messiah. That was the position of “mujaddid” in which the general Muslims were willing to accept him.

The entire article can be read at the link given above, and shows that by mujaddid the author means the claim advanced by Hazrat Mirza sahib at the start of the 14th century in 1883 (which no one considers as that of prophethood).