I'm trying to switch to client-side compilation in Configuration->Advanced->Developer->Frontend Development Workflow however the option is disabled and I cant' select it. It says

not available in production mode

however I'm in developer mode from what I can see.

  • in app/etc/env.php I have

'MAGE_MODE' => 'developer',

  • in php bin/magento deploy:mode:show the result is

Current application mode: developer.

  • in .htaccess there is the line

SetEnv MAGE_MODE developer

  • I've cleaned generated/code directory
  • I've ran php bin/magento cache:clean
  • I've set ownership/permissions to all folders and files

Any ideas what else I can try?

After further troubleshooting I can see in vendor/magento/module-developer/Block/Adminhtml/System/Config/WorkflowType.php

if ($this->_appState->getMode() == \Magento\Framework\App\State::MODE_PRODUCTION) 

returns false so I'm definitely NOT in production mode and parent::render() is called.

Afterwards in vendor/magento/module-config/Block/System/Config/Form/Field.php

I can see $isCheckboxRequired is true and $element->getInherit() returns 1 so the field is disabled.

public function render(\Magento\Framework\Data\Form\Element\AbstractElement $element)
    $isCheckboxRequired = $this->_isInheritCheckboxRequired($element);

    // Disable element if value is inherited from other scope. Flag has to be set before the value is rendered.
    if ($element->getInherit() == 1 && $isCheckboxRequired) {

However I can't see from the field definition in system.xml why this field is impossible to edit for me.

  • Have you tried running bin/magento deploy:mode:set developer
    – harri
    Commented Dec 10, 2017 at 12:01
  • Yes I did, I also cleared the following folders var/cache, generated/metadata, generated/code, var/view_preprocessed, pub/static
    – gabtzi
    Commented Dec 10, 2017 at 12:02
  • hmm I not sure could it be set in the apache config file? /etc/apache2/sites-available/mage2.conf or something?
    – harri
    Commented Dec 10, 2017 at 12:04
  • I checked all files related to configuration apache/nginx and there is no reference to the MAGE_MODE variable. I did add some troubleshooting info after stepping in through the code though.
    – gabtzi
    Commented Dec 10, 2017 at 12:28

1 Answer 1


If this setting is disabled, this value was most likely hard-coded in the app/etc/config.php file. Look for the lines:

'front_end_development_workflow' => [
    'type' => 'server_side_compilation'

and remove them from the file.

You'll then need to import the new configuration by running:

bin/magento app:config:import

After reloading the page, the setting should no longer be disabled.

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