if i try to pay with paytm am getting this error "Invalid Form Key. Please refresh the page error" How do i fix it

2 Answers 2


You can try by increasing the value of max_input_vars in php.ini file. By default, this value is set to 1000. You should set it to 5000 or 10000.

Then Restart your server and check that process.

  • I have tried this but this is not working for me . I used a custom payment method (paytm) and it's redirects to home page with the same message
    – user81874
    Commented Nov 19, 2019 at 10:00

Please try the below query

DELETE FROM `core_config_data` WHERE path='web/cookie/cookie_domain';

Then run the below commands via CLI:

sudo php bin/magento cache:flush

sudo php bin/magento cache:clean

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