When I let to add bot in Telegram I get:
Unfortunately, we were unable to process your submitted @igiftsbot bot.
Reason: bot presented does not fulfill its essential functions. Sometimes this is due to technical failure or bot is under development. In these cases, the best solution is to correct the work of the bot, and then send it back to users are satisfied and do not leave negative feedback."
I really sorry, but I can't understand what's wrong, because I also check my bot as this on my behalf. Thanks.