Please try with reinstalling the game first:
-First, remove the game from Facebook: https://www.facebook.com/settings?tab=applications
-Clear the cache on your browser: http://www.wikihow.com/Clear-Your-Browser%27s-Cache
-Close the browser and reinstall the game:https://apps.facebook.com/papapear
Try also another browser than you currently are using. Recommended browsers for our games are Google Chrome, Mozilla Firefox and Opera. Make also sure your browser is up to date:https://www.whatismybrowser.com
If none of this helps, please comment below what OS, browser and browser version you play on. E.g. Windows 10, Chrome 72 or Windows 7, Mozilla Firefox 65. You'll find these details by clicking on the link above.
Attach also a screen shot of the game or the error message you get so we can see how the issue looks like.
Thanks for helping us out!