1 lakh per day ecom limit.
You are a third person who said that transactions are failing, I don't know why.
Anyway, it's working successfully for 99% of other users.
Set your transaction limit, activate e-com transactions (also activate ecom, pos, contactless etc). Also, activate it during bank working hours and try.
Wait for 48 hours after applying for the card as well. Set card PIN too.