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    If you want to remove ‘Invalid security or form key. Please refresh the page’ error message when logged in to Magento admin 2.4.x, then you need to make changes to the following file.

    Step 1 : Open the vendor file like /vendor/magento/module-backend/App/Action/Plugin/Authentication.php and override to your custom theme

    Step 2 : Find below code in the bottom section of the Authentication.php file. Approx line no. 228

    Step 3 : Replace above code with below mentioned code

     

    Step 4 : After change above code, please run below mentioned commands

     

     

    That’s it…

    Now logout your admin panel and again logged in and see your error now resolved…

    Fill the below form if you have any Magento programming need.





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