I have been using your plugin for a little while but recently and all of a sudden when I click the donate button it sends me to a blank screen. I don't think it's your plugin however because my other plugin does the same thing when trying to transfer a user over to paypal.
I uninstalled the plugin and tried to reinstall it and it works for a short period of time but then stops again. after a few clicks through the websites.
Any help would be appreciated I like your app.