Update 8.3.6 to 8.3.7 || 8.4.0 errors

Enocured site problems message before plain update to Drupal 4.3.6 to newest.

Some pages can be opened – some with errors.

I was backup files on time before update but now site is down with message about encored error on every page I was open.
Seems, problem associated with DB.

p.s.: after every update I do I have problem with views module. It’s broken every time and I need to reinstall in and recreate blocks manually.

Whats about Drupal stability? It’s horror.

Drupal version: 


Source: https://www.drupal.org/taxonomy/term/21/feed