I think your build is broken. Pressing "Start" opens up an empty dialoque box. Also the filename of your zip is mistyped. It's a zip archive but the extension is like .zp or something and it doesn't work automaticallu.
I rebuild the project https://mega.nz/file/XV8mzbiI#g54o5y0OPMtrs1bZG8PmORC91nw5Ns-zUgF_QVe2v2I
