Is TWebClientDataSet supposed to work with FMX?

I tried to reuse some WebCore code for a FMX project and run into an error. I have a TWebConnection and a TWebClientDataSet. While the TWebConnection seems top work, iterating the TWebClientDataSet yields an "Abstract Error". So - is TWebClientDataSet supposed to work with FMX?

TMS WEB Core components are for TMS WEB Core projects, not for FMX projects.