Regions bank app not working

I have had the Regions Bank app on my iphones and ipads for years. Now the app does not work on my Iphone X or my Ipad Pro 9.5. was working fine. now I get the message "Attention Unable to process request at this time." Have spoke with both Apple and Regions - and no one has an answer for me. this app works fine on my husband's Iphone X. I have deleted the app and rebooted both devices. any suggestions?