Unable to serialize value Magento 2.2.6

[sasupo]

Hi,

we installed fresh magento 2.2.6, imported all products and installed custom theme with extensions. Page was working fine for 1 week, today after flushing cache I get an error and can not access frontend, admin is working fine.

Frontend error:

There has been an error processing your request

Exception printing is disabled by default for security reasons.

Error log record number: 1380112499148

Error in var/report/file-number:

{"0":"Unable to serialize value.","1":"#0 \/home\/buylandia\/public_html\/vendor\/magento\/framework\/App\/PageCache\/Kernel.php(153): Magento\\Framework\\Serialize\\Serializer\\Json->serialize(Array)\

n#1 \/home\/buylandia\/public_html\/vendor\/magento\/module-page-cache\/Model\/Controller\/Result\/BuiltinPlugin.php(96): Magento\\Framework\\App\\PageCache\\Kernel->process(Object(Magento\\Framework\\App\\Response\\Http\\Interceptor))\

n#2 \/home\/buylandia\/public_html\/vendor\/magento\/framework\/Interception\/Interceptor.php(146): Magento\\PageCache\\Model\\Controller\\Result\\BuiltinPlugin->afterRenderResult(Object(Magento\\Framework\\View\\Result\\Page\\Interceptor), Object(Magento\\Framework\\View\\Result\\Page\\Interceptor), Object(Magento\\Framework\\App\\Response\\Http\\Interceptor))\

n#3\/home\/buylandia\/public_html\/vendor\/magento\/framework\/Interception\/Interceptor.php(153): Magento\\Framework\\View\\Result\\Page\\Interceptor->Magento\\Framework\\Interception\\{closure}(Object(Magento\\Framework\\App\\Response\\Http\\Interceptor))\

n#4\/home\/buylandia\/public_html\/generated\/code\/Magento\/Framework\/View\/Result\/Page\/Interceptor.php(130): Magento\\Framework\\View\\Result\\Page\\Interceptor->___callPlugins('renderResult', Array, Array)\

n#5 \/home\/buylandia\/public_html\/vendor\/magento\/framework\/App\/Http.php(139): Magento\\Framework\\View\\Result\\Page\\Interceptor->renderResult(Object(Magento\\Framework\\App\\Response\\Http\\Interceptor))\

n#6\/home\/buylandia\/public_html\/generated\/code\/Magento\/Framework\/App\/Http\/Interceptor.php(24): Magento\\Framework\\App\\Http->launch()\

n#7 \/home\/buylandia\/public_html\/vendor\/magento\/framework\/App\/Bootstrap.php(257): Magento\\Framework\\App\\Http\\Interceptor->launch()\

n#8 \/home\/buylandia\/public_html\/index.php(39): Magento\\Framework\\App\\Bootstrap->run(Object(Magento\\Framework\\App\\Http\\Interceptor))\

n#9 {main}","url":"\/index.php","script_name":"\/index.php"}

Anyone able to help?

[Surbhiagr]

Hello @sasupo

Regarding the serialisation problem you are facing i think you should try using this command

sudo php bin/magento setup:static-content:deploy de_DE --jobs=0 -f

And for further clarification please check out this link

https://magento.stackexchange.com/questions/202448/magento-2-2-1-unable-to-serialize-value

Hope it helps!

If it works for you kudos and accept as solution

[Manish Mittal]

Hello @sasupo

Please follow below steps:

Please remove var cache as sudo rm -rf var/cache var/page_cache var/view_preprocessed

sudo php bin/magento setup:upgrade

sudo php bin/magento setup:static-content:deploy -f

sudo php bin/magento cache:flush

sudo chmod -R 0777 var/ pub/ /generated

Now try again.