It sounds like there is some leftover code in your store's theme after uninstalling the Paywhirl app for Shopify. If you are wary of editing theme code I'd suggest reaching out to Paywhirl's support team for direct assistance: https://shop.paywhirl.com/support
If you're more of the DIY type, then you should be able to fix this issue by manually removing the leftover code from the store's theme using the code editor in Shopify (found in the admin under Online Store > Themes > Actions > Edit code). Based on the screenshot you provided I'm assuming there is a Liquid tag for 'include' or 'render' in templates/customers/account.liquid that needs to be removed. Here is a help article from Paywhirl's help center with some more details: https://docs.paywhirl.com/PayWhirl/en/articles/4601051-theme-installation-and-troubleshooting-guide
Hopefully this helps!