UTR Library Designer Error

Template 5'-UTR Sequence (25NT) : AAAAAUGAGUAGAUWUAWUAUAAAGGAGGAWWWSW ( Length should be 25NT ) ,     Additional Constraints for designing 5'-UTR sequence (25NT) : NNNNNNNNNNNNNNNNNNNNNNNNN

Protein Coding Sequence (at least N-term 35NT) : GTGAAAATTTCTGTAGCAGGCTCAGGATATGTCGGCCTATCCTTGAGTATTTTACTGGC

16s rRNA Sequence : ACCUCCUUU

Desired Expression Range : 10002.55 ~ 992672.55

Number of expression-level intermediates : 16