Google Sheets error (Range not found (line 39)) when adding 2 sumColoredCells

Question

=sumColoredCells(F5:F42,H1) // works fine
=sumColoredCells(F5:F42,J1) // works fine
=sumColoredCells(F5:F42,J1) + 1 // works fine

=A1 + B1 // works where A1 is =sum