I have applied the
SUPEE-9767 patch for the correct version (188.8.131.52) of Magento and in the admin area, I can see the warning at the top of the page, indicating that the patch was successful.
However, when I navigate to the settings menu to enable the form-key option, it is not there.
I've cleared cache etc. and nothing seems to make the option visible. I've just updated about a dozen sites on different versions of Magento with no issues but this site is causing a huge problem. Can anyone help me to fix this issue please?