Updating from Drupal 8 to Dupal 9 Errors

Has anyone else had success updating to Drupal 9?

All of the pluginns have been updated based on what is listed in the Extend > Update tab. The core has been updated to Drupal 8.9.3. Whenever an attempt is made to update to Drupal 9 using Installatron it always gives the " The website encountered an unexpected error. Please try again later."