If you have trouble playing Anime Pirates, try to do a Clear Cache in your browser (Especially after Maintenance).
Here is the Clear Cache Tutorial, this tutorial applies common browsers such as Mozilla Firefox and Google Chrome. Check tutorial below:
First open the browser, press Ctrl + Shift + Delete Together
When you press Ctrl + Shift + Delete together, Pop up display will appear to do the Clear Cache.
If you still find error after Clear Cache you can report your concerns to http://support.playwebgame.com/en related problems that you are facing.