Error when trying to deploy a form

Dear everyone,
I am having a problem every time I try to deploy a form. Kindly assist.

our form cannot be deployed because it contains errors:

ODK Validate Errors: >> XForm is invalid. See above for the errors. : Invalid calculate for the bind attached to “${total}” : Couldn’t understand the expression starting at this point: ͎$(males)+$(fema… in expression $(males)+$(females) The following files failed validation: ${tmpwf4t97w6} Result: Invalid.

I am also getting this message:
Error occured during the loading of this form. We do not recommend you use this form for data entry until this is resolved.

Please contact support@kobotoolbox.org with the link to this page and the error message below:

FormLogicError: Could not evaluate: $(males)+$(females), message: callNative() can’t handle nodeset functions yet for $()

James

@muriithi85, seems like you have an issue here:

Instead it should rather be ${males}+${females}

You will need to replace the ( and ) with { and } brackets when referencing a variable name.