No custom block page

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Expected Behaviour:

I would like to indicate the users on my network that the site they’re trying to access is blocked by pihole…

I’ve looked here:
and added BLOCKINGMODE=IP-NODATA-AAAA to my file /etc/pihole/pihole-FTL.conf

What am I missing?

Actual Behaviour:

Debug Token:

You have some error in the config:

   [2019-07-07 10:04:33.232 3268] Ignoring unknown blocking mode, fallback is NULL blocking
   [2019-07-07 10:04:33.232 3268]    BLOCKINGMODE: Null IPs for blocked domains

Okay that’s weird.
this is the only two lines I’ve in /etc/pihole/pihole-FTL.conf


How should I do to get a proper blocking page?

You have misspelled IP-NODATA-AAAA