TurboTax Desktop for 2023 Will Not Accept an Entry for Medical Mileage Deduction

TurboTax Premier 2023 version WinPerRelease 23.000.321: Federal Taxes --> Deductions & Credits --> "Tell us about anything spent on medical travel"  --  The field for "Miles driven to get medical care" will not allow any entry, then complains that "Value must be greater than 0." I had entered into the details dialog for the field the miles driven during the year to 9 separate medical facilities, so nine lines that automatically added up to 1,857 miles. Normally, the details dialog would feed the number to the parent field, but it is not working in this case.