In the help pages the second example for function SUMIF has a typo which causes an error. English help page: https://help.libreoffice.org/6.3/en-US/text/scalc/01/04060106.html?DbPAR=CALC#bm_id3151957 German help page: https://help.libreoffice.org/6.3/de/text/scalc/01/04060106.html?DbPAR=CALC#bm_id3151957 It also affects the local help, which can be installed along LibreOffice. The example =SUMIF(A1:A10;">0";B1:10) leads to "Error:502". The second range should by fixed by adding the missing "B" =SUMIF(A1:A10;">0";B1:B10) to make it work. The typo also occurs in the older wiki help at https://help.libreoffice.org/Calc/Mathematical_Functions#Example_54 https://help.libreoffice.org/Calc/Mathematical_Functions/de#Beispiel_54 It seems that more localized versions of the help pages are affected.
The line to fix the bundled LibreOffice help and the online help is: https://github.com/LibreOffice/help/blob/ccdc4ebe207ab439f424a64887ba3f3d0f87e9d8/source/text/scalc/01/04060106.xhp#L1175
Olivier Hallot committed a patch related to this issue. It has been pushed to "libreoffice-6-4": https://git.libreoffice.org/help/commit/69ff0a1d2a16290e9d1549dd6bf3049cf0ad719e tdf#128911 typo in formula SUMIF.