Upgrading Drupal

Hi,

Tried to uprade to 8.5.1 from 8.5.0 using composer :

composer update drupal/core --with-dependencies

this does not upgrade drupal core.

There seems to be a dependency with webflo/drupal-core-require-dev

as you can see when using : composer prohibits drupal/core:8.5.1

so i used : composer update drupal/core webflo/drupal-core-require-dev --with-dependencies

That worked

I upgraded to 7.58 and now get this error:

"The GD library for PHP is missing or outdated."

However, when I run "php -m" from command line, GD is listed.

I'm using PHP 7.2.3 on Ubuntu 16.04.

Apologies if I'm posting to the wrong forum its my first time and I didn't bring a condom :)

In any case, our site runs Drupal 7.57 on IIS8.5 with MYSQL and PHP 7.2.3.

Our issue began when our web admin upgraded PHP from 7.2.1 to 7.2.3

Once that was done the website would post this message (just once however)

Deprecated function: The each() function is deprecated. This message will be suppressed on further calls in menu_set_active_trail() (line 2405 of C:\inetpub\wwwroot\includes\menu.inc).

Should I manually update drupal core from 8.3.7 to directly 8.5 or gradually increase version. Like:

• 8.3.7-8.4.0-8.5
• 8.3.7-8.4.5-8.5
• 8.3.7-8.4.0-8.4.5-8.5

It is a multilingual site.

After upgrading from 8.4.5 to 8.5 I can not access Admin/config. Here the log message:

"Drupal\Component\Plugin\Exception\PluginNotFoundException: The "file_uri" plugin does not exist. in Drupal\Core\Plugin\DefaultPluginManager->doGetDefinition() (line 52 of /usr/share/nginx/html/core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php)"

EDIT: After clearing cache, can not access the site at all...

Hi,
When running the DB updates I got the following error message: 

An AJAX HTTP error occurred.
HTTP Result Code: 200
Debugging information follows.
Path: /update.php/start?id=36&op=do_nojs&op=do
StatusText: OK
ResponseText: 

And I got one long error message in the upgrade/report log, starting with: "Error: Call to a member function getSchema() "
And also one long warning message: starting with "Undefined index: uuid in Drupal\views\EntityViewsData->mapFieldDefinition() (line 380 of "