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We are facing an issue after upgrading Magento version to 2.3.5.

Invalid form key. Please refresh the page.  

is showing on every page only on safari browser.

  • We are having the same issue after upgrading to Magento ver. 2.3.5-p1 Only affecting safari browser. I've changed to developer mode with bin/magento d:m:set developer Ran rm -rf var/di/* var/generation/* var/cache/* var/log/* var/page_cache/* var/session/* var/view_preprocessed/* And then bin/magento d:m:set production to recompile and clear caches Issue still present in safari only. – S.Paper Aug 23 at 7:10
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Ok I fixed this error by updating my cps_whitelist.xml file.

Unfortunately I can't say what policy fixed it. I think it was in policy id="connect-src" for Facebook.com

https://sherocommerce.com/magento-content-security-policy/

We are having the same issue after upgrading to Magento ver. 2.3.5-p1 Only affecting safari browser. I've changed to developer mode with bin/magento d:m:set developer Ran rm -rf var/di/* var/generation/* var/cache/* var/log/* var/page_cache/* var/session/* var/view_preprocessed/* And then bin/magento d:m:set production to recompile and clear caches Issue still present in safari only.

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Try a clear browser cache and delete the cookies.

Check the Magento error log file if logged with any error.

If not work then please try to increase the value of max_input_vars in the php.ini file. By default, this value is set to 1000. You should set it to 5000 or 10000.

Also, check by removing generated, var/cache, var/page_cache, var/view_processed directories, and run below commands in case if it helps to solve the issue.

php bin/magento setup:di:compile
php bin/magento cache:clean
php bin/magento cache:flush
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