herp derp error in notifications

ive clicked on a new notification i get, and i get the "herp. derp. error" error when i click on the notification to go to the manga, but if i have an older notification for the same manga it allows me to go to the manga, so i was wondering, is this happening to anyone else?

I get this from time to time as well. I get it when I check some of my notifications and sometimes when I use the search bar to find stuff