=SUMIFS(INDIRECT("'"&$C$3&"'!h2:h365"),INDIRECT("'"&$C$3&"'!c2:c365",G3),INDIRECT("'"&$C$3&"'!d2:d365",A13))
This formula returns a value of '0', instead of 40
When I remove the indirect function, i.e
=SUMIFS('2019'!H2:H365,'2019'!C2:C365,"="&G3,'2019'!D2:D365,"="&A11)
I get the value 40...