HI !!
Check your chatid and token again following this tutorial:
To configure the plugin, you need a valid Telegram API token. Its easy to get starting a Telegram Bot.
You can learn about obtaining tokens and generating new ones in
this document https://core.telegram.org/bots#6-botfather/
or follow the info in this post https://medium.com/shibinco/create-a-telegram-bot-using-botfather-and-get-the-api-token-900ba00e0f39
You also need at least one “chatid” number, that is the recipient to the message will be send. To know you personal chatid number, search on telegram app for “@get_id_bot” or https://t.me/RawDataBot
Once You got the 2 fields save the configuration and try the “TEST” button .. you should receive a message in you telegram : “WOW IT WORKS” !! If not, check token and chatid fields again for the correct values.
I hope it can Help !!