Magento Upgrade EE 2.4.3 to EE 2.4.5-p1

[anurac01no72df]

Magento Upgrade went fine but after that in static content deploy and in admin panel facing admin Magento\/spectrum theme issues and getting exception error.

{"0":"Unable to load theme by specified key:
'Magento\/spectrum'","1":"#1 Magento\\Theme\\Model\\View\\Design->setDesignTheme() called at [vendor\\magento\\module-theme\\Model\\View\\Design.php:217]\n
#2 Magento\\Theme\\Model\\View\\Design->setDefaultDesignTheme() called at [vendor\\magento\\framework\\App\\Area.php:264]\n
#3 Magento\\Framework\\App\\Area->_initDesign() called at [vendor\\magento\\framework\\App\\Area.php:222]\n
#4 Magento\\Framework\\App\\Area->_loadPart() called at [vendor\\magento\\framework\\App\\Area.php:146]\n
#5 Magento\\Framework\\App\\Area->load() called at [vendor\\magento\\framework\\App\\FrontController.php:188]\n
#6 Magento\\Framework\\App\\FrontController->processRequest() called at [vendor\\magento\\framework\\App\\FrontController.php:147]\n
#7 Magento\\Framework\\App\\FrontController->dispatch() called at [vendor\\magento\\framework\\Interception\\Interceptor.php:58]\n
#8 Magento\\Framework\\App\\FrontController\\Interceptor->___callParent() called at [vendor\\magento\\framework\\Interception\\Interceptor.php:138]\n
#9 Magento\\Framework\\App\\FrontController\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at
[vendor\\magento\\framework\\Interception\\Interceptor.php:153]\n
#10 Magento\\Framework\\App\\FrontController\\Interceptor->___callPlugins() called at
[generated\\code\\Magento\\Framework\\App\\FrontController\\Interceptor.php:23]\n
#11 Magento\\Framework\\App\\FrontController\\Interceptor->dispatch() called at [vendor\\magento\\framework\\App\\Http.php:116]\n
#12 Magento\\Framework\\App\\Http->launch() called at [generated\\code\\Magento\\Framework\\App\\Http\\Interceptor.php:23]\n
#13 Magento\\Framework\\App\\Http\\Interceptor->launch() called at [vendor\\magento\\framework\\App\\Bootstrap.php:264]

[Mukesh Tiwari]

Hi @anurac01no72df 

you might have deleted a theme from admin.

Run following command in the database

delete from core_config_data where path = 'design/theme/theme_id' and value = '1';

I have taken the key value from error Unable to load theme by specified key:
'Magento\/spectrum'","1"

Note:
Make sure to keep a database backup if you are running it directly on production.

[anurac01no72df]

Hi @Mukesh Tiwari 
Thanks for quick reply , i am checking there is no entry in table "core_config_data" with "design/theme/theme_id".
It says no record found.

[Mukesh Tiwari · Accepted solution]

@anurac01no72df 

There must be an entry at least for the theme which you have configured.

For example like following.

Thanks

[anurac01no72df]

I have updated Table and its working fine.

Thanks for support.

[anurac01no72df]

Hello @Mukesh Tiwari 
My Admin panel is working fine , When i Open front end i am getting following error.

Invalid template file: 'Magento_Backend::page/js/require_js.phtml' in module: 'Magento_Backend' block's name: 'require.js'

I am sharing My Core Config Theme Entry , with Theme table and Error screen shot.

[Mukesh Tiwari]

Hi @anurac01no72df 

You may have to fix the code in the following file
vendor/magento/framework/view/element/template/file/validator.php

Please read the solution given in https://magento.stackexchange.com/a/255585/3895 

Thanks

[anurac01no72df]

i already did that changes.

protected function isPathInDirectories($path, $directories)
{
if (!is_array($directories)) {
$directories = (array)$directories;
}
$realPath = $this->fileDriver->getRealPath($path);
$realPath = str_replace('\\', '/', $realPath); // extra code added
foreach ($directories as $directory) {
if ($directory !== null && 0 === strpos($realPath, $directory)) {
return true;
}
}
return false;
}