I had a very quick look at this. The URLs used are on domain fanfox.net. From what I can see, this is now behind Cloudflare. And that is blocking the requests. Based on the issues seen with FanFicFare and sites hosted behind Cloudflare, it will be a pain to solve. It might work with FlareSolverr which FFF uses it. But, it probably needs changes to the plugin to use it.
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