The auto-solver could not fetch the captcha PNG from Discord's CDN, or Selenium failed to start a browser for the hCaptcha web-solver path.
Download failures come from a network blip, CDN expiry, or rate limiting. Browser-launch failures come from missing Chrome/Chromium or webdriver-manager being unable to fetch the driver offline.
For download failures the bot retries automatically; if persistent, check your network/proxy and that discord.com and cdn.discordapp.com are reachable. For browser-launch failures install Chrome or Chromium, ensure webdriver-manager can fetch the driver, and on headless servers install chromium-browser plus the required shared libs.
pip install selenium
# no system browser installed
pkg install chromium -y
pip install selenium webdriver-manager