Error on product page

[kamzata]

I'm using Openmage 20.12.0. Visit the product page leads to this error:

Fatal error:  Uncaught Error: Class "MatthiasMullie\Minify\JS" not found in /var/www/magento/vendor/fballiano/openmage-cssjs-minify/app/code/community/Fballiano/CssjsMinify/Model/Observer.php:40
Stack trace:
#0 [internal function]: Fballiano_CssjsMinify_Model_Observer->{closure}()
#1 /var/www/magento/vendor/fballiano/openmage-cssjs-minify/app/code/community/Fballiano/CssjsMinify/Model/Observer.php(32): preg_replace_callback()
#2 /var/www/magento/app/code/core/Mage/Core/Model/App.php(1447): Fballiano_CssjsMinify_Model_Observer->httpResponseSendBefore()
#3 /var/www/magento/app/code/core/Mage/Core/Model/App.php(1425): Mage_Core_Model_App->_callObserverMethod()
#4 /var/www/magento/app/Mage.php(521): Mage_Core_Model_App->dispatchEvent()
#5 /var/www/magento/app/code/core/Mage/Core/Controller/Response/Http.php(73): Mage::dispatchEvent()
#6 /var/www/magento/app/code/core/Mage/Core/Controller/Varien/Front.php(194): Mage_Core_Controller_Response_Http->sendResponse()
#7 /var/www/magento/app/code/core/Mage/Core/Model/App.php(357): Mage_Core_Controller_Varien_Front->dispatch()
#8 /var/www/magento/app/Mage.php(749): Mage_Core_Model_App->run()
#9 /var/www/magento/index.php(57): Mage::run()
#10 {main}
  thrown in /var/www/magento/vendor/fballiano/openmage-cssjs-minify/app/code/community/Fballiano/CssjsMinify/Model/Observer.php on line 40

Installing it with composer require matthiasmullie/minify seems to make disappear the error but files don't seem minified.

[fballiano]

yes you've to install the module via composer, but if the whole system isn't managed by composer I guess it won't work out well.

Is you openmage installed via composer?

[kamzata]

Yes, it is. Addison74 says there already should be an option to minify the assets in OpenMage but I cannot see it. Is that correct? So, why should I use your extension?

[fballiano]

As far as I remember there's no minification in openmage.

if openmage is installed via composer, then running composer require fballiano/openmage-cssjs-minify must also install MatthiasMullie\Minify as it's a direct dependency.

but if the system can't find the class it mean the composer patch for openmage is not installed or not working (but it comes built in the openmage core since long time, i was the one adding it to the core.

if you know about https://mahocommerce.com, which is done by me, it has a built in minification with 103 early hints support, just in case ;-)