If you get the following message on any channel/chat, follow these steps to unblock it.

Using the web version of Telegram on your phone.
- Search on google for Telegram Web.(https://web.telegram.org/)

- Login. You will receive a code on Telegram app. Put the code and continue.


- Once you're in,click the 3 dots on the upper left and go to settings.

- Go to "Privacy and Security"

- Scroll down and make sure the blue check is on for "Disable Filtering"

- Restart Telegram App.