I loaded up the email in Firefox, waited to see if the coupon image loaded - it showed up as just a white block. Then I right clicked the block and hit reload image. It just takes a little time.
Getting the same error as everyone else. XP And I refreshed both my email and the page to show the email online page a bunch of times. Will check it later. Not in a rush, so it's all good.
Hopefully, the problem will be resolved in the near future though, as I'm pretty sure that there are a LOT of angry people right now... ^^;
Reloading the image never helps, I have no idea how you even do that on Chrome. I hate Firefox, so I guess I just have to wait for Nintendo to make things work.