Hi @rayroh, sorry to see you’ve been having trouble with the key.
If you attempt to install your license after 24 hours, you will no longer be able to automatically install the Wordfence license key. Additionally, if you are in a different browser than the one used when requesting your Free Wordfence license, you will be unable to automatically install your new Free Wordfence license. In those cases you will need to manually copy and paste the key from the email to complete the activation of Wordfence Security.
If you copy/paste your new Wordfence Free license key into the “License Key” field and you receive a message “Error Installing License”, first verify that you did not inadvertently copy only part of the license key or overwrite a portion of the license key when pasting the key in to the text box. When in doubt, clear out the field and recopy/paste the key into the “License Key” field. If this does not work, return to the WordPress plugin page and request a new key by selecting the button “Get Your Wordfence License”.
Let me know if this persists after switching to a newly requested key.
Thanks,
Peter.