I am trying to Update Drupal 8 from 8.6.14 to latest 8.9.6, when changing Core & Vendor folder for new ones, geting blank white screen; Modules are also versions around 1-2 years old;
At one point I was getting some warning that my Pathauto version 1.4 is too old, but how can I update Pathauto, if New Versions Drupal doesn't work with old Pathauto?! - and New Pathauto doesn't work with Old Drupal?!
Also, I am now reading Logs, not that I understand something there....
Error Logs gives many errors or 2 kinds, while I was switching core / new & core old: