I am creating a sub-domain and on that I am trying to create Drupal website. (I am not able to create simple installation provided by many hosting companies , mostly due to I am trying to install on subdomain) When trying to install Drupal Manually following this procedure,(stuck at this step 4) I am getting error HTTP 500 saying unable to handle this request.
Then I checked the error logs for more detail.
There I found PHP Fatal error: Class 'Drupal\Component\Utility\OpCodeCache' not found in mysubdomain/install.php on line 37
I am an absolute beginner on Drupal, and am using the book Drupal 8 for Absolute Beginners in order to learn. Chapter 1 of the book, "Installing Drupal," uses Acquia to install Drupal. I attempted to do this and failed; the installation logs claimed that Acquia was not compatible with my version of Windows (I am using Windows 7, which is supposed to be supported). Instead, I am attempting to follow the installation steps as described in the book's appendix, "Installing Drupal with XAMPP on a Windows Machine."
My project, on my local development box, is a drupal 8.6.4 site created with the drupal-composer/drupal-project template. I have commited it to a local git repository and pushed it up to github. This is an incomplete version of my site as it does not contain core and cannot be used as is to clone a new site. The tutorials on creating a cloned site use a two-repository approach: git drupal and git project. The git drupal creates an installation with an architecture that differs from the drupal-composer architecture - it does not have the /web subdirectory. So far my google searches hav