Errors solved

On this page you can find some of the errors I encountered, and how I solved them.

Error

The "returnTo" querystring parameter X is not defined as a valid URL in "Allowed Logout URLs".

Error

[ERROR] drupal console Command "generate:entity:config", is not a valid command name.

Error

Warning: Invalid argument supplied for foreach() in Drupal\Core\Render\Element\Checkboxes::valueCallback() (line 100 of core/lib/Drupal/Core/Render/Element/Checkboxes.php).

Error

Warning: array_key_exists(): The first argument should be either a string or an integer in Drupal\easy_breadcrumb\EasyBreadcrumbBuilder->build() (line 240 of /<path to docroot>/modules/contrib/easy_breadcrumb/src/EasyBreadcrumbBuilder.php)

Error

Mpdf\MpdfException: Temporary files directory /var/www/html/vendor/mpdf/mpdf/src/Config/../../tmp is not writable in Mpdf\Cache

Error

Warning: key() expects parameter 1 to be array, null given in Drupal\user\AccountForm->buildEntity() (line 312 of core/modules/user/src/AccountForm.php).

Error

Undefined index: line 153 of core/modules/content_translation/src/Plugin/Validation/Constraint/ContentTranslationSynchronizedFieldsConstraintValidator.php

Error

Resource blocked due to MIME type mismatch (X-Content-Type-Options: nosniff)

Error

Drupal 8 console error: Command is not a valid command name [SOLVED].

Error

The provided host name is not valid for this server drupal 8 error [SOLVED]

Error

No route found for the specified format html. Supported formats: json, xml [SOLVED]

Error

SyntaxError: expected expression, got '<'

Error

The entity type did not specify a x form class [SOLVED]

Error

Error: Call to a member function getPurchasableEntityTypeId() on null in Drupal\commerce_order\Entity\OrderItem::bundleFieldDefinitions()

Error

Numeric value out of range: 1264 Out of range value for column X

Error

Drupal 8: The following module is missing from the file system...

Error

Drupal 8 drush: Attempting to re-run cron while it is already running [FIXED].

Error

User warning: The following theme is missing from the file system: X in drupal_get_filename()

Error

Only variables should be passed by reference views_embed_view drupal 8

Error

InvalidArgumentException: Placeholders must have a trailing [] if they are to be expanded with an array of values.

Error

Drupal 8 api call returns 301 error moved permanently

Error

Invalid path or filename /usr/bin/java for java executable

Error

Fix drupal 8 javascript theme error: ReferenceError: Drupal is not defined.

Error

Drupal\Component\Plugin\Exception\PluginException: Plugin (footer_block) instance class "Drupal\my_module\Plugin\Block\footer_block" does not exist.

Error

Class [myClass] is not autoloadable, can not call post-update-cmd script

Error

failed to open stream: HTTP wrapper does not support writeable connections

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