Hi,
Well, that's just the debug of the MySQL queries on the page.
The page doesn't seem to be completely blank.
So in that case, you should normally see an error message when you click on a "wrong" link even with the debug turned off.
Could you try to switch to protostar, the default template, and try to use that link again?
Do you see an error message in that case?
Also, how did you get that link ? Did to create a cart with a test user account of your own with a cart that you left there ?
Could you also provide a screenshot of the settings of the reminder plugin ?