Nothing personal, but pish-tosh. I’m sure you can find someone Credentialed to aver that “not one” can take a plural verb, but you can also find someone Credentialed to assert that one can use “they” as a singular, neuter pronoun.
It is here that civilization stands or falls.
While I disagree on this particular point, I respect your willingness to serve as a sentinel of our beloved language. It is indeed one of the plinths upon which our civilization’s pllars rest.