There's some problems with the download link provided (the link for sideload). Please check the link and the integrity of .apk
The hosting website provide 2 download button where, the green one redirects to * . (your country) . usenet . nl
(DO NOT CLICK IT - check in google and see...)
The second download button (which is assumed to be the good one) redirect to a blank page. Btw, right-clicking with "save file as" works and you can download the .apk, but the MD5 checksum given (ccd73080823171e69dc8d8ad1cbd1646) does not match with the .apk downloaded.