Hello,
That link actually looks like an internal path from an AI chat or a cloud service rather than a regular link you can just open or turn into an app. The /mnt/data bit usually means the file was stored in a temporary sandbox on a server somewhere and it does not exist on your computer yet.
Where exactly did you copy this text from? Also did the file end in .sip or is that a typo for .zip. Let me know where you generated or got this optimizer from so we can figure out the right way to actually download it to your Windows PC.