The Telegram Login Widget embeds oauth.telegram.org in an iframe; without an explicit frame-src directive it fell back to default-src 'self' and was blocked. Add frame-src https://oauth.telegram.org so the login flow loads.
The Telegram Login Widget embeds oauth.telegram.org in an iframe; without an explicit frame-src directive it fell back to default-src 'self' and was blocked. Add frame-src https://oauth.telegram.org so the login flow loads.