Issue with filing ITR Onli

Dear Friends, 

I am an NRI and am trying to file my ITR Return for the year 2018-19 on the Income Tax Portal

After filling the necessary sheets on the excel file, when i press on Calculate Tax, i get the following error:

I have been trying to get some assistance from the local tax office but have not been successful. I request your support in helping me identify the source of this error and solution on how to solve it

Thanking all of you in advance

Regards

Karun Raman