Here's my test sheet.
Localization is USA with timezone GMT+1 I've tried substituting ',' with ';' to no avail.
https://docs.google.com/spreadsheets/d/1pZku_X6b49uMhKivnv3N1uv6sekYrhY12IlUct_Zudc/edit?usp=sharing
As you can see, sumif/sumifs with open ranges returns #ERROR. I know it should work because I've done sumifs with open ranges before and worked as intended.
Can someone help? Thanks