Why isn’t Application Bot responding to commands?
Firstly, check to see if Application Bot is online in your server.
If Application Bot is online, try resetting your prefix. Find out how to reset your prefix here.
Still not working?
Click on the server name again and select Server Settings.
From here, select Roles and find Application Bot’s default role.
Under General Permissions, ensure Administrator is toggled. It should
look like this:
Now back out of the settings by clicking ESC and try the command again.