Privoxy encountered an error while processing your request:
Could not load template file no-server-data or one of its included components.
Please contact your proxy administrator.
If you are the proxy administrator, please put the required file(s)in the (confdir)/templates directory. The location of the (confdir) directory is specified in the main Privoxy config file. (It’s typically the Privoxy install directory).
The 500 error is an error caused by the proxy of the user, not IF, IF uses a proxy, but not that one. Most likely, the proxy was returned a 403 (forbidden) error due to the lack of javascript, and the proxy overwrite the error code.