You are downloading the Yubscribe XAP file v126.96.36.199 for Windows Phone. Yubscribe is a free and useful Social app: With Yubscribe you can see all subscribers of your favourites YouTube channels in one ... You can now download the offline XAP file to install & try it.
Download Locations for Yubscribe 188.8.131.52 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Yubscribe XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.