Hi tgatto,
We'd like to help you find the best solution. Some financial and other interactive sites may require users/customers to allow cookies, popup windows and cross-site tracking
• Enable cookies
Safari > Preferences > Privacy > Website tracking:
Uncheck the box beside “Prevent cross-site Tracking
Safari > Preferences > Privacy > Cookies and website data:
Uncheck the box beside Block all cookies
For details: Change Privacy preferences in Safari on Mac
• Some websites may ask a user to allow pop-up windows.
Visit the site.
Safari > Preferences > Websites > Pop-up windows
Click the box next to website and choose “Allow”.
For details: Change Websites preferences in Safari on Mac
Note: This is a privacy feature. Once transaction is over, set this back to defaults.
We hope this helps you reach a solution. Thank you for using Apple Support Communities.