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How to fix «Element 'block', attribute 'class': [facet 'pattern'] The value '\Magento\Framework\View\Element\Template' is not accepted by the pattern `[A-Z][_a-zA-Z\d]*(\\[A-Z][_a-zA-Z\d]*)*`» after upgrading Magento to 2.2?
[Upgrade]
(3)
How to fix «The specified image adapter cannot be used because of: Required PHP extension 'Imagick' was not loaded.»?
[Administration]
(3)
How to fix the bug of Aheadworks OneStepCheckout not showing a payment module on the frontend checkout screen?
[Third-party extensions]
(1)
How to remove the «One or more integrations have been reset because of a change to their xml configs» backend messsage?
[Administration]
(2)
I need to implement the multi-shipping feature for the ready Vantiv payment module
[Third-party extensions]
(4)
How to fix the «Can't create directory 'generated/code' in Magento/Framework/Code/Generator.php» Magento 2.2 issue?
[Administration]
(5)
How to fix the «You did not sign in correctly or your account is temporarily disabled» backend issue?
[Administration]
(6)
How to disable the standard Magento 2 authentication timeouts from the command line?
[Administration]
(1)
How to fix «Unable to process binding "blockLoader: function (){return isLoading }"»?
[Third-party extensions]
(2)
How to fix «Cannot read property 'fn' of undefined» in Thelist/westyle/en_US/js/owlcarousel/owl.carousel.min.js?
[Third-party extensions]
(2)
How to fix «TheList\Contactusemail\Controller\Index\Contactusemail» / «Extra parameters passed to parent construct»?
[Third-party extensions]
(2)
How to fix the «Undefined offset: 1 in vendor/magento/framework/App/Utility/Files.php on line 748» failure on a `js-translation.json` HTTP request?
[Third-party extensions]
(3)
OrangeHill Article: How to fix the «Invalid Document» / «Element 'resource': The attribute 'title' is required but missing» failure in Magento to 2.2?
[Upgrade]
(2)