error msg 'Invalid security or form key. Please refresh the page'- Magento 2.4.2-p2

[napawanjac68c2]

error 'Invalid security or form key. Please refresh the page' displays after login to admin backend

Then refresh the page, the msg disappear.

[dipmegpro]

Hello @napawanjac68c2 

This is the default message that came from the Magento system. When the admin session time is over. there is no bug related to this message.

If you get the solution then please, "Kudos" and "Accept as Solution" for Token of Appreciation

[nitish_raj1]

run this command 

php bin/magento config:set system/security/max_session_size_admin 0