Hi bperdichi,
Thanks for contacting Apple Support Communities!
We understand that you're unable to use the Capital One app on your iPad.
It looks like you've already reviewed If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open - Apple Support.
If you found the app on the App Store, contact the app developer.
If you've already completed the steps outlined in the article, we'd recommend that you contact the app developer directly to investigate this further with you. They're best suited to assist you.
Take care!