Upgrading GVH from 2.3.2 to 2.3.3 generates an error;

Upgrading GVH from 2.3.2 to 2.3.3 generates an error;

I couldn’t figure out why the upgrading GVH from 2.3.2 to 2.3.3 generates an error shown below:

/customer/servlet/servlet.FileDownload?file=00P6000000elzkGEAQ

I made some edits on the code of "Handheld.json.js" file and this edit was reflected to our viewer without any problem,so why this edit made "Handheld.json.js" file invalid and our viewer is failed to upgrade?

What might be the issue here?

Thanks

Lubna