php ver 8.1

Error happened during deploy process: Deprecated Functionality: pathinfo(): Passing null to parameter #1 ($path) of type string is deprecated in /vendor/magento/framework/View/Asset/PreProcessor/FileNameResolver.php on line 45

if any person face this error and solved please help to solved this error


7 Answers 7


Make sure that logo of theme is here app/design/frontend/[Your Vendor]/[Theme Name]/web/images/logo.svg

It is necessary. But I guess it is bug of Magento 2 with PHP 8.1

  • 4
    Thanks. This isn't quite correct, but took me to the bug report [github.com/magento/magento2/issues/35293]. Adding web/images/logo.png to all child themes worked for me. Commented Jun 28, 2022 at 13:33
  • This works. thank you! saved me a lot of time.
    – Mac A.
    Commented Jan 23 at 16:10

The issue has been caused because your custom theme doesn't have a preview image, then PHP 8.1 throws that error due to Magento core logic.

Fix that by adding an image to your custom theme.

For example: app/design/frontend/[Your Vendor]/[Theme Name]/web/images/logo.svg

Magento 2 custom theme image

  • Hello @Rafael Corrêa Gomes, Thanks for your reply but i already adding an image to my custom theme Even then the error comes Commented May 19, 2022 at 11:09

Worked for me without modifying the vendor/magento/framework/App/Utility/Files.php.

After modifying theme.xml file and adding a preview image. i also added a logo.svg in theme folder/web/images/logo.svg and it worked

    if (!$files) {
                echo $themePackage->getVendor(). '' .  $themePackage->getName().'<br>';
                $result[] = [
                    $themePackage->getVendor() . '/' . $themePackage->getName(),

Just add the echo and u can see which theme is creating the issue


Backtrace the error

Add the following code in /vendor/magento/framework/View/Asset/PreProcessor/FileNameResolver.php above line 45

if ($fileName === null) { 

For me, the backtrace output was something like this:

#0 vendor/magento/module-deploy/Collector/Collector.php(97): Magento\Framework\View\Asset\PreProcessor\FileNameResolver->resolve(NULL)
#1 vendor/magento/module-deploy/Package/PackagePool.php(183): Magento\Deploy\Collector\Collector->collect()
#2 vendor/magento/module-deploy/Package/PackagePool.php(117): Magento\Deploy\Package\PackagePool->collect()
#3 vendor/magento/module-deploy/Strategy/QuickDeploy.php(54): Magento\Deploy\Package\PackagePool->getPackagesForDeployment(Array)

I had to create the following patch to fix the error:

--- a/vendor/magento/module-deploy/Collector/Collector.php
+++ b/vendor/magento/module-deploy/Collector/Collector.php
@@ -90,7 +90,7 @@
         foreach ($this->sourcePool->getAll() as $source) {
             $files = $source->get();
             foreach ($files as $file) {
-                if ($file->getModule() && !$this->moduleManager->isEnabled($file->getModule())) {
+                if ($file->getModule() && !$this->moduleManager->isEnabled($file->getModule()) || is_null($file->getFileName())) {
  • 1
    Patch worked perfectly, Thanks. for people wondering how to use a patch just nano patch_for_245.patch mylook-upgraded-245 and paste above code there and apply with patch -p1 < patch_for_245.patch Commented Sep 28, 2023 at 16:21

I have deleted theme then getting the same error. When i running the content deploy command.

Deploy using quick strategy Error happened during deploy process: Deprecated Functionality: pathinfo(): Passing null to parameter #1 ($path) of type string is deprecated in /vendor/magento/framework/View/Asset/PreProcessor/FileNameResolver.php on line 42

So for this i have added this solution and working fine.


$extension = pathinfo($fileName, PATHINFO_EXTENSION);


$extension = pathinfo($fileName ?? "", PATHINFO_EXTENSION);


If the theme is Porto, the following may help:

rm -R ./app/design/frontend/Smartwave/porto_child

Solution: –

Go to the parent directory of your theme, it must be in

vendor/magento/theme-magento-blank or theme-magneto-luma/ then web/images, copy logo.svg and put this in your theme directory


The problem was we should put the logo.svg image file in our theme:


In Magento 2.4.4, Child themes need to have a logo.svg file.

Once you copied logo.svg from parent to your theme. Do the following :

Remove the files and folders present inside pub/static/frontend
Remove the files and folders present inside var/view_preprocessed/pub/static/frontend
Run the deploy command  – php bin/magento s:s:d -f

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