Uploading with URLs gives error WEBPAGE_CURL_FAILED¶
This error means Telegram’s servers were unable to fetch the file from the URL you provided. Common reasons:
The URL is behind a login wall, CAPTCHA, or Cloudflare protection.
The server is blocking Telegram’s IP ranges.
The URL returns a redirect that Telegram does not follow.
The file at the URL is too large for Telegram’s downloader.
Solution: Download the file locally and upload it directly instead of passing a URL.