iferror with array formula

That would become:

=IFERROR(MEDIAN(IF($A$2:$A$12=$E2,IF($C$2:$C$12=F$1,$B$2:$B$12))),"")

or you could write it as this:

=IFERROR(MEDIAN(IF(($A$2:$A$12=$E2)*($C$2:$C$12=F$1),$B$2:$B$12)),"")

where the * is equivalent to AND.

Whichever version you use, you must confirm the formula using the key combination of Ctrl-Shift-Enter (CSE), rather than the usual Enter.

Hope this helps.

Pete