Please fix the errors on your P14 and P35 spreadsheet and upload again.
Error found in Employee P14 CSV file
Employee : Mr Jade Fourteen : Please check the Employee's Name for invalid characters. First character must not be a space.
ECON : ECON (Employers Contracted Out Number) must be in the format of the letter E followed by numbers in the range of 3000000 - 3999999 followed by a letter.