followUp instead of reply as the command may already have replied when it errors out

events/client/interactionCreate.js

@@ -61,7 +61,7 @@ export default {
 		}
 		catch (error) {
 			console.error(error);
-			await interaction.reply({ content: 'There was an error while executing this command!', ephemeral: true });
+			await interaction.followUp({ content: 'There was an error while executing this command!', ephemeral: true });
 		}
 	},
 };