I dont know whats happening but nothing happens when i press the enter button. i have auto commit installed and thats not working either. i disabled the app and its still not working. I just wana study 
can anyone help?
same thing randomly happening here for me
If you have any third-party scripts installed, please try WaniKani from a different browser and let me know if you’re still having this issue.
If you’re using the Double-Check user script, that is likely the cause.
Temp fix has been provided here
Main script has been updated now 
you may have to manually check for updates in Tampermonkey