If a person has left the group in the past, you need to be in their Telegram contacts to add them back.
They can still join via an invite link as long as they are not on the group's invite link as long as they are not on the Removed Users list.
194
抱歉，該使用者決定退出這個群組，所以您無法將此人加回這裡。
29/194
🌸 𝓚𝓲𝓽𝓽𝔂 ℂ𝕒𝕥 🌸 🇭🇰🇯🇵🇹🇼🇱🇷🇰🇷,
Dec 15, 2018 at 15:44
抱歉，該使用者用戶決定退出這個群組，所以您無法將此人加回這裡。
28/194
🌸 𝓚𝓲𝓽𝓽𝔂 ℂ𝕒𝕥 🌸 🇭🇰🇯🇵🇹🇼🇱🇷🇰🇷,
Dec 15, 2018 at 09:23