I'm trying to integrate PayPal payment with Drupal which entails creating Developer/Sandbox accounts. I've created Personal and Business testing accounts in my PayPal Developer dashboard and set their initial balances and tried $1,000,000, $1,000, or $100 values. However, when I logged in to their corresponding Sandbox accounts, it still indicates a $0.00 balance. I've tried creating other Gmail and PayPal accounts to create other testing accounts, but the result is the same.
Also, I've resorted to creating test accounts since when I tried clicking/editing the Profile link in the default test accounts (to try to see their passwords/edit their default balances), the opened modal window will be in an indefinite "processing.." state.
Hence, it seems that there are at least 2 issues for the test accounts: Profile link not loading/rendering and initial balances are being reset or not being propagated to their target Sandbox accounts (the latter is more important I guess).
Furthermore, a similar issue happened 3 years ago: PayPal Sandbox Accounts Blank