An invalid XML character (Unicode: 0x..) was found in the CDATA sectionThis error occour when blogger verify template in respect to given document type:
but still after verify document if it found some invalid nonUTF8 unicode char ,that is invisible but exist in markup blogger give you an error,for clear those invalid char i make one console application you can download it from here : nonUTF8 unicode char Remover
after download this follow this step:-1: run this program
2: enter file path that you want to clean.(Blogger template.xml)
it will save filtered file to source file directory with name fileteredtext.xml ,and it ready to use,you can rename as you want..