Invalid Request: While adding telegram channel

Hi all,

I am trying to add channel Telegram to my bot. I have generated access token and name for it as state dinthe instructions but when try to I save it it gives me the error of Invalid request. What could be the reason
?

@jasaswini.rath,

Kindly share the sequence of steps followed and error screenshot along with the network/console errors, so that we can review and share our observations.