Important to keep in mind that 11/24 is the Wednesday before Thanksgiving so one of (if not the) busiest domestic travel days of the year.

Also I see cheap-ish award prices in business for just DFW-LHR on 11/24, but these are of course web specials. There's nothing at the sAAver level, and you need sAAver level space on the AA segments to connect with the BA segments in order for everything to price out as a single 57.5k award.

I see sAAver business space on 11/24 on MIA-LHR-PRG for example (AA metal across the pond), but there's nothing sAAver from DFW-MIA (again not surprising given it's the Wed. before Thanksgiving). So aa.com isn't going to give you the option of say DFW-MIA-LHR-PRG as a single award.

I don't think it's an AA IT issue but rather just there's truly nothing available at the moment in business that week