Formulas or Formulae

[Quarrel42]

I very recently downloaded Soft Maker for the spreadsheet. Unfortunately I have tried to input 3 [three] formulas, but I am receiving something saying that I cannot save my workbook until the formulas are corrected. These same formulae have been used in Microsoft Excel for at least 15 years to my knowledge. Can anybody explain, please, what I am doing wrong.

[SuperTech]

Thank you for trying SoftMaker Office. Please share the complete details of the problem for better understanding like which all formulae you are trying, screenshot of the problem etc.