How to pay rent using non Bilt card?

I saw random posts few months ago of using other credit cards including AMEX to pay rent on bilt, but I couldn’t make it work. I added both Visa and Amex cards to my bilt. These options are greyed out and small note below them says “not accepted”, when I click on it, it says “your property is only accepting Bilt Mastercard”

Am I missing something? How to fix this?