Magento 2.4.3 – UI Component Rendering Error Due to System Exception

magento2magento2.4.3

Just upgraded my local machine to Magento 2.4.3 CE.

On the admin side, I keep getting errors:

A technical problem with the server created an error. Try again to continue what you were doing. If the problem persists, try again later.

This error happens on every admin page. I cleared sessions / cleared cache / restarted docker containers – same thing.

When I look into console, I see this request is failing:

http://magento.test/admin/mui/index/render/key/479b831574442521ca469efdc376886fde3c57d23eebbaced4a6a7f65a44bf10/?namespace=notification_area&sorting[field]=created_at&sorting[direction]=asc&isAjax=true

The response to that request is:

UI component could not be rendered because of system exception
error code: "0"

In Exception logs I see this error:

[2021-08-13 22:48:42] main.CRITICAL: Unable to unserialize value. {"exception":"[object] (InvalidArgumentException(code: 0): Unable to unserialize value. at /var/www/php/vendor/magento/framework/Serialize/Serializer/Serialize.php:35)"} []

Any ideas what this could be? My only guess is the notifications at the top of the Admin page where Indexer / Cache warnings show up is failing? Maybe?

UPDATE:

Looked at the piece of code the error is referring to and it's just checking if the string is null/false/empty:

It looks like I have to go hunting elsewhere for this issue. There might have been issue when I did an upgrade with Magento Framework. Going to research that next and maybe re-install it.

Best Answer

Looks like it's a 2.4.3 issue with sessions.

Github issue: https://github.com/magento/magento2/issues/33748

After setting security sessions to 0 the issue stopped.

Stores->Configuration->Advanced->System->Max Session Size in Admin

Stores->Configuration->Advanced->System->Max Session Size in Storefront

bin/magento config:set system/security/max_session_size_admin 2592000

bin/magento config:set system/security/max_session_size_storefront 2592000

Not sure if this is a full solution yet. Hopefully they come up with a better solution than just setting the value to 0.

UPDATE:

Another solution is to change disable_locking in your redis session settings:

'disable_locking' => '0', to 'disable_locking' => '1'

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If you get the error "Decoding failed: Syntax error" I would check the module's composer.json file. For me this has happened a couple of times due to a comma that is not needed inside the require parameters.

If your composer file has this:

"require": {
    "php": "~5.6.0|7.0.2|~7.0.6",
    "magento/module-catalog": "101.0.*",
    "magento/module-checkout": "100.1.*",
},

You will see this error every time. Instead, remove the comma on your last required value. It should now look like this.

"require": {
    "php": "~5.6.0|7.0.2|~7.0.6",
    "magento/module-catalog": "101.0.*",
    "magento/module-checkout": "100.1.*"
},

I haven't tested but this error would probably happen for each parameter if the last value has a comma at the end.

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Insert in your core_config_data tabel below data and check after clearing cache and cookie

INSERT INTO core_config_data ( scope, scope_id, path, value) VALUES ( 'default', 0, 'web/seo/use_rewrites', '1')

you can do this by admin marketing->url rewrite option but your admin currently not working So insert manually and check.

       array('config_id' => '3','scope' => 'default','scope_id' => '0','path' =>'web/unsecure/base_url','value' => 'http://www.newmillsoutlet.co.uk/'),
    array('config_id' => '4','scope' => 'default','scope_id' => '0','path' => 'web/secure/base_url','value' => 'http://www.newmillsoutlet.co.uk/'),
    array('config_id' => '240','scope' => 'default','scope_id' => '0','path' => 'web/url/use_store','value' => '1'),
    array('config_id' => '241','scope' => 'default','scope_id' => '0','path' => 'web/url/redirect_to_base','value' => '1'),
    array('config_id' => '242','scope' => 'default','scope_id' => '0','path' => 'web/seo/use_rewrites','value' => '1'),
    array('config_id' => '243','scope' => 'default','scope_id' => '0','path' => 'web/unsecure/base_link_url','value' => '{{unsecure_base_url}}'),
    array('config_id' => '244','scope' => 'default','scope_id' => '0','path' => 'web/unsecure/base_skin_url','value' => '{{unsecure_base_url}}skin/'),
    array('config_id' => '245','scope' => 'default','scope_id' => '0','path' => 'web/unsecure/base_media_url','value' => '{{unsecure_base_url}}/media/'),
    array('config_id' => '246','scope' => 'default','scope_id' => '0','path' => 'web/unsecure/base_js_url','value' => '{{unsecure_base_url}}js/'),
    array('config_id' => '247','scope' => 'default','scope_id' => '0','path' => 'web/secure/base_link_url','value' => '{{secure_base_url}}'),
    array('config_id' => '248','scope' => 'default','scope_id' => '0','path' => 'web/secure/base_skin_url','value' => '{{secure_base_url}}skin/'),
    array('config_id' => '249','scope' => 'default','scope_id' => '0','path' => 'web/secure/base_media_url','value' => '{{secure_base_url}}/media/'),
    array('config_id' => '250','scope' => 'default','scope_id' => '0','path' => 'web/secure/base_js_url','value' => '{{secure_base_url}}js/'),
    array('config_id' => '251','scope' => 'default','scope_id' => '0','path' => 'web/secure/use_in_frontend','value' => '0'),
    array('config_id' => '252','scope' => 'default','scope_id' => '0','path' => 'web/secure/use_in_adminhtml','value' => '0'),
    array('config_id' => '253','scope' => 'default','scope_id' => '0','path' => 'web/secure/offloader_header','value' => 'SSL_OFFLOADED'),
    array('config_id' => '254','scope' => 'default','scope_id' => '0','path' => 'web/default/front','value' => 'cms'),
    array('config_id' => '255','scope' => 'default','scope_id' => '0','path' => 'web/default/cms_home_page','value' => 'home'),
    array('config_id' => '256','scope' => 'default','scope_id' => '0','path' => 'web/default/no_route','value' => 'cms/index/noRoute'),
    array('config_id' => '257','scope' => 'default','scope_id' => '0','path' => 'web/default/cms_no_route','value' => 'no-route'),
    array('config_id' => '258','scope' => 'default','scope_id' => '0','path' => 'web/default/cms_no_cookies','value' => 'enable-cookies'),
    array('config_id' => '259','scope' => 'default','scope_id' => '0','path' => 'web/default/show_cms_breadcrumbs','value' => '1'),
    array('config_id' => '260','scope' => 'default','scope_id' => '0','path' => 'web/polls/poll_check_by_ip','value' => '0'),
    array('config_id' => '261','scope' => 'default','scope_id' => '0','path' => 'web/cookie/cookie_lifetime','value' => '36000000'),
    array('config_id' => '262','scope' => 'default','scope_id' => '0','path' => 'web/cookie/cookie_path','value' => NULL),
    array('config_id' => '263','scope' => 'default','scope_id' => '0','path' => 'web/cookie/cookie_domain','value' => NULL),
    array('config_id' => '264','scope' => 'default','scope_id' => '0','path' => 'web/cookie/cookie_httponly','value' => '1'),
    array('config_id' => '265','scope' => 'default','scope_id' => '0','path' => 'web/session/use_remote_addr','value' => '0'),
    array('config_id' => '266','scope' => 'default','scope_id' => '0','path' => 'web/session/use_http_via','value' => '0'),
    array('config_id' => '267','scope' => 'default','scope_id' => '0','path' => 'web/session/use_http_x_forwarded_for','value' => '0'),
    array('config_id' => '268','scope' => 'default','scope_id' => '0','path' => 'web/session/use_http_user_agent','value' => '0'),
    array('config_id' => '269','scope' => 'default','scope_id' => '0','path' => 'web/session/use_frontend_sid','value' => '0'),
    array('config_id' => '270','scope' => 'default','scope_id' => '0','path' => 'web/browser_capabilities/cookies','value' => '1'),
    array('config_id' => '271','scope' => 'default','scope_id' => '0','path' => 'web/browser_capabilities/javascript','value' => '1'),
    array('config_id' => '1334','scope' => 'default','scope_id' => '0','path' => 'web/cookie/cookie_restriction','value' => '0')

Best Answer

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