Press on the opera mini logo.A menu will pop up, click on downloads.The invalid link pops up, open the download folder where u downloaded the file.Now copy the downloaded file,paste it somewhere for backup.now go back to the downloads and click on the three dots.copy the link,again click on the three dots.delete the file,go back and open a new tab.paste the link on the search bar and click on next.now download the error file in the download folder.when the download starts pause it.now open the download location and delete the file.go to backup file and move to download folder.now open the opera browser.u are now done.