Unable to generate xml file for itr 2 for ay 16-17

- I have to file ITR 2 on behalf of my father who unfortunately passed away some time ago

- I am trying to generate XML from Excel file, however, getting error: 'Run time error -2146232576 (80131700)'

- I googled for advice on the issue, advice was given regarding ensuring excel version is latest as well as Windows version. I am using Windows 10 and Excel 2016. Further have saved ITR 2 file as .xlsm

Can anyone please help me in this issue?