Drupal 8.x

Both the zip and the tar.gz files are corrupt and will not expand properly

I have a hierarchical taxonomy vocabulary, "Living Things". A simplified excerpt looks like this:

Plants
--Roses
----Red Rose
----Pink Rose
--Orchids
----White Orchid
----Yellow Orchid

I have media (images and videos) that have a field, "Primary Taxon", which references the appropriate term in that "Living Things" vocabulary. e.g. An image of various roses has its "Primary Taxon" field set to "Roses", and a video of a white orchid has its "Primary Taxon" field set to "White Orchid".

Hello , maybe anyone can help me ?

with update to 8,4 i got problem with fatal errors in continent no possible  create , so  upgrade to 8.5  with continent all ok , but now cant access to configuration and reports .

this getting if trying go in configuration or reports :

The website encountered an unexpected error. Please try again later.

please tell me how i can solve that 

I need your help! I realy do!

I locked me out of Drupal. I run the updates of some plugins with automaticly set the maintenance mode on. Then an error occured and the site is still in maintenance mode.

How can I turn the page in normal mode?
I already tried with "?q=admin" at the end of the URL as described in other posts. But I alwyas gat en HTTP 500 error.

Please help! Thanks in advance.

Given the CSV example below using the migrate_source_csv:

id, subject, chapter,     tutorial
1,  Drupal,   Chapter 01, Tutorial 01
2,  Drupal,   Chapter 02, Tutorial 02
3,  Drupal,   Chapter 03, Tutorial 03
4,  Drupal,   Chapter 04, Tutorial 04
5,  Drupal,   Chapter 05, Tutorial 05

Is it possible to process the subject column to create: