Wrong number of arguments

I can purge links with the “Purge URLs” page without any problem.

However, the plugin does not appear to be properly purging anything automatically.

When I enable debug mode, all I see is this entry, repeated hundreds and hundreds of times:

ban req.http.host == "" && req.url ~ "^$"
{"code":"106","msg":"Wrong number of arguments\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "" && req.url ~ "^$"
{"code":"106","msg":"Wrong number of arguments\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "" && req.url ~ "^$"
{"code":"106","msg":"Wrong number of arguments\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "" && req.url ~ "^$"
{"code":"106","msg":"Wrong number of arguments\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "" && req.url ~ "^$"
{"code":"106","msg":"Wrong number of arguments\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "" && req.url ~ "^$"
{"code":"106","msg":"Wrong number of arguments\n"}
ban req.http.host == "mysite.com" && req.url ~ "^/$"
{"code":"200","msg":"\n"}
ban req.http.host == "" && req.url ~ "^$"
{"code":"106","msg":"Wrong number of arguments\n"}

…over and over and over again. It’s like the plugin is failing to extract the proper URL for the content to be purged, and uses “^/$” instead.

I have no idea how to fix this. Any advice?