I got this today as well, on captcha breaker, but only when using the update button. It worked fine on 1 server and on another server at the same host, it took like 10 mins to download the update (and the server is on a 1Gbit connection) and then it gave this.
But it does work and is fine on the other machine. So as Sven mentioned just download the update straight from the website rather then using the update.
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But it does work and is fine on the other machine. So as Sven mentioned just download the update straight from the website rather then using the update.