See the related question below.
It may well be a problem with their webpage "Take a Break" or could possibly be they've erroneously listed your IP as a spammer.
If it continues you may need to contact them direct.
I managed to get on the 'spammers list' on a website I was involved with once, when we were checking out it's security settings. Had to get a minion to remove me from the 'blocked list'. Quite embarrassing ☺☺☺
Recheck your url you use to get to the online site as well, as per sir.prize's link.