The "integer" plugin does not exist.

@adityaj We need a little more information. Did /update.php proceed without errors? What action is taken that triggers the error?

"drush up" from Drupal 8.2.7 to 8.3.5 exhibited this error.

many of the update procedures ran smoothly, but drupal is choking with the following updates pending:

system module :
Update entity displays to contain the region for each field.
Force caches using hashes to be cleared (Twig, render cache, etc.).
Force plugin definitions to be cleared. @see https:www.drupal.orgnode2802663

user module :
Enforce order of role permissions.

views module :
Rebuild caches to ensure schema changes are read in.

I've run updb 3 times.

The full error message is:

Failed: Drupal\Component\Plugin\Exception\PluginNotFoundException: The "integer" plugin does not exist. in [error]
Drupal\Core\Plugin\DefaultPluginManager->doGetDefinition() (line 52 of
~/core/lib/Drupal/Component/Plugin/Discovery/DiscoveryTrait.php).

For those who are getting this after running drush updb, have you also ran drush entup? If not, try running drush entup and then drush updb again.

It's really hard to diagnose errors like this without more specific steps to reproduce the problem. Try documenting things like your installed contributed modules, database, PHP version, etc. so that you and others encountering the error can see if there's a common thread.

I think this is likely a duplicate of #2869773: Upgrade to 8.3.0: PluginNotFoundException: The "entity_reference_autocomplete_category" plugin does not exist.

#2903161: Fix incorrect FieldFormatter id for "weight" field in base field definition in display options

As an option just try to add this code in enabled custom module in your project.

/**
 * Implements hook_entity_base_field_info_alter().
 *
 * @see hook_entity_base_field_info_alter()
 * @see https://www.drupal.org/node/2346329
 */
function menu_item_extras_entity_base_field_info_alter(&$fields, EntityTypeInterface $entity_type) {
  /** @var \Drupal\Core\Field\BaseFieldDefinition[] $fields */
  if ($entity_type->id() === 'menu_link_content' && isset($fields['weight'])) {
    $options = $fields["weight"]->getDisplayOptions('view');
    // Lets check if field definition is buggy.
    if ($options['type'] === 'integer') {
      $options['type'] = 'number_integer';
      // @TODO: This should be fixed in the menu_link_content core module.
      // @see https://www.drupal.org/node/2903161
      $fields['weight']->setDisplayOptions('view', $options);
    }
  }
}

If it does not help, check out may be some other display options in other modules that use incorrect plugin id.

the related fixed in 8.4 #2903161: Fix incorrect FieldFormatter id for "weight" field in base field definition in display options

feel free to reopen if possible to reproduce