why can't I join the telegram group?

https://i.imgur.com/71gu4Yn.jpg

It says this chat is no longer accessible. I want to join the bounty. But can't join the telegram.

Please try that link - https://t.me/ico_eloplaycom_en
or share your telegram ID and we'll add you to the chat.

Yes that would be helpful. My telegram ID is ichanjay.
Is it necessary to join the telegram first before joining the signature campaign?

No, that's up to you.