Can't get Yahoo Mail (business) to work on iphone or ipad

Hi all, I went through all the suggested troubleshoot in a different thread, but my issue is specific to yahoo bizmail (through Turbify now). Ever since the switch over to Turbify I have been having trouble getting my mail through the apple mail app. This past week I have been having to go in and manually refresh my business email to see new message. NOT ideal. So I followed the troubleshooting suggestions and I'm in an even worse spot now. I cannot get the yahoo mail app to work at all, it keeps giving me an error page that says "Uh Oh, looks like something went wrong. Please try again later".

I have deleted and reinstalled all the apps multiple times, logged in all different ways. Most recently I deleted the reinstalled the mail app (I was just doing the yahoo app) and I got the same error page when trying to login. So now I cannot access my yahoo account anywhere but my browser. I'm ALL apple, my business partner has an android and has no issues with the app. So it's an apple compatibility thing I'm guessing. If anyone has any brilliant suggestions I am game. Yahoo mail only has $$ premium customer service but I'm thinking they won't be much help either way. I just got a new ipad today, same issues there.