Command 'pin' not working after deployment to Heroku. Specifically

Question

I got this bot that I made. Every piece of command works just fine after I deployed it via

git push heroku master

Except this piece of code

const Telegraf = require('telegraf');
const Telegram = require('telegraf/telegram')
const bot = new Telegraf('******');

bot.command(['pin', 'Pin', 'PIN'], function(ctx) {
        if (ctx.message.reply_to_message == undefined){
            ctx.reply("Asegurate de responder al mensaje que quieras fijar")
    }

        var chatId = ctx.chat.id;
        var fromId = ctx.from.id;
        var messageId = ctx.message_id;
        var chatype = ctx.chat.type;
        var replyFrom = ctx.message.reply_to_message.message_id;
        var fromName = ctx.from.username;
        
        const opts = {};
        opts.disable_notification = false;
        
        ctx.telegram.getChatMember(chatId, fromId).then(function(data){
            if ((data.status == 'creator') || (data.status == 'administrator')){
                if (chatype == 'supergroup'){
                    ctx.telegram.pinChatMessage(chatId, replyFrom);
                    ctx.deleteMessage();
                }
                else if (chatype == 'private'){
                    ctx.telegram.sendMessage(chatId, "Comando solo disponible en supergrupos");
                }
                else if (chatype == 'group'){
                    ctx.telegram.sendMessage(chatId, "Comando solo disponible en supergrupos.");
                }
            }
            else {
                ctx.telegram.sendMessage(chatId, "Lo siento " + fromName + " no eres administrador");
            }
        })
});

I have no clue what's causing this problem. The terminal shows no errors and it only works once I bot.launch() it. I have tried re-writting it from scratch, made it differently but nothing works. Every piece of advise and/or comments are helpful. Thanks in advance.