Yeah, the moment I got that PFL i sharedearlier, I and my husband were totally confused, so we hired an immigration lawyer to help us out on how to reply which we did. The lawyer helped me write
a letter, which I explained that my husband has never been married before. And then, my husband as well wrote an affidavit swearing and explaining himself that he was never married before (to the mother of his son who was just a girl friend and where never in a marriage like situation for 1 year or more or Common law relationship and they never cohabitated so the the Divorce Certificate don't exist) and then after, he took his letter/affidavit to the Notary Public.
It's now been three weeks, there's no response from the IRCC. I'm in my forth week. So I'm patiently waiting.