Installing Drupal

I'm trying to install drupal 8 per the instructions on this website:

https://www.drupal.org/node/307956

I then get to the part on the above link where it says

"5. Browse to http://localhost/drupal/install.php and follow the instructions it gives. For the database information, use what you set up in step 3. See Getting started Run-script for more details."

I am attempting to move a drupal 8 install to a new server. I copied all of the files and the database to the new server and adjusted the settings folder with the new database information.

The site and all of its pages, display correctly, but whenever I attempt to login in, I just get the "The website encountered an unexpected error. Please try again later." white screen.

Can anyone offer a suggestion as to what is causing the error? Perhaps something about the new servers apache configuration?

Or, without using drush, how can I best track my issue down?

I have successfully installed XAMPP to c:xampp, extracted Drupal into its HTDOCS subfolder, setup a database with phpmyadmin but am now stuck on running the Drupal installation step. This step says to point my browser to my "base url" which seemingly is "localhost/drupal-833/". But, I get an error message that no object can be found. How can I get the Drupal install.php file to run?

Redeveloping a site in Drupal 8.

Never had issues with previous versions of Drupal on this VPS server but for 2 days I've been trying to load D8 on a Dreamhost server with no luck.

First it failed on the SSD based VPS that runs Nginx so I reverted to the previous VPS that uses Apache and the problem is the same.

In both cases the install is pretty much perfect then when you access the site every page beyond the home page is a 404 error.

http://peacepharm.org/info.php

I have created a sub-domain and trying to install drupal on it, by using "Installation Guide". When trying to run "Sub-domain name/installation.php" I am getting error HTTP 500 saying unable to handle this request.

When Checking Error log I found PHP Fatal error: Class 'Drupal\Component\Utility\OpCodeCache' not found in mysubdomain/install.php on line 37

I have given correct permissions (755 to directories, install.php and 644 to other files)

Problem solved