How to use INDIRECT with a SUMIF formula for a date range
Try this out and see if it works:
=SUMIFS(INDIRECT("'"&A1&"'!5:5"),INDIRECT("'"&A1&"'!2:2"),">="&B1,INDIRECT("'"&A1&"'!2:2"),"<="&C1)
Try this out and see if it works:
=SUMIFS(INDIRECT("'"&A1&"'!5:5"),INDIRECT("'"&A1&"'!2:2"),">="&B1,INDIRECT("'"&A1&"'!2:2"),"<="&C1)