I have two personal sandbox accounts, which I use to test, and I have a donate button.
When clicking on the donate button and the user is already logged in the donation process works perfectly.
However, when clicking on the donate button and the user logs in at moment of payment it appears this error: "Cannot GET /myaccount/summary/member". Then, you have start again (being logged in) if you want to donate.
I don't know if this error happens only with sandbox accounts or also with real Paypal accounts.
