I don’t know why no one will answer you. If the proper Church accepted resolution to previous marriages cannot be arrived at–then there is no answer but that the two must not have marital relations. It’s a strange thing to be sure, but if you can’t get an annulment, you are essentially told tough. The church has no compassionate answer for what it considers a non sacramental marriage as far as I have ever heard. I inquired for a friend for the same reason and that is what I was told by the archdiocese of my area.
I can understand if the previous marriage or spouses were Catholic, but I do not understand why two folks who have never been catholic divorce and one wants to marry a Catholic cannot do so unless the non-Catholics jump through some legalistic hoops to get their marriage declared invalid for a new proposed spouses sake. It’s utterly silly to me at least.
My advice: ignore the entire matter, go to mass as usual, and forget about it. Nobody is likely to ask anyway. Course, that is likely to not be well received here, where sin is the major issue of the day.