This error message indicates that you are trying to use a text button in an inline keyboard, which is not allowed according to the Telegram API. To resolve this issue, you will need to modify your code to use callback buttons instead of text buttons in your inline keyboard.
Here's an example of how you can adapt your code:
```python
from aiogram import Bot, Dispatcher, types
bot = Bot('YOUR_TOKEN')
dp = Dispatcher(bot)
@dp.message_handler(commands=['subscribe'])
async def subscribe(message: types.Message):
keyboard = types.InlineKeyboardMarkup()
subscribe_btn = types.InlineKeyboardButton(text="Subscribe", callback_data="subscribe")
keyboard.add(subscribe_btn)
await message.answer("Would you like to subscribe?", reply_markup=keyboard)
@dp.callback_query_handler(text="subscribe")
async def subscribe_confirm(query: types.CallbackQuery):
await bot.answer_callback_query(callback_query_id=query.id, text="You have successfully subscribed!")
# Perform subscription logic here
if __name__ == "__main__":
dp.start_polling()
```
In this code snippet, we are using an InlineKeyboardButton with a callback_data parameter instead of text. By using callback buttons, you can avoid the "Bad Request: can't parse inline keyboard button" error and ensure proper functionality of your inline keyboard.
Make sure to update your code accordingly and test it to ensure that the issue has been resolved.