You should use a laptop or computer. The game won't respond if you're using a phone.The only thing that's accessible on phones is the forum.
Mind you, I'm aware that you're new to the site, but please update your profile picture to something that does not have an IRL person.
It isn't permitted in this site, Thank you.
Alright sorry I didn't see the reply.
Next time just click on reply under the comment you're trying to respond to just so that the author can get the notification.
As for your issue, make sure you're using Chrome.
In most cases it could be your web browser that's not letting you. Try using Incognito just to be sure if it's just glitching on you.