Brute Force Protection API Key Error

Hello,

I keep getting an error when I insert my email in Settings -> Brute Force Protection, where it says

Get your iThemes Brute Force Protection API Key
Enter email and click Save All Changes

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Leverage the power of the iThemes Brute Force Protection network to ban IPs hitting your site.

The error I received 4 times in a row:

There was an error getting an API key from the IPCheck server. If the problem persists please contact support.

https://wordpress.org/plugins/better-wp-security/