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You will have to reinstall the printer. Go to this website --> https://www.usa.canon.com/internet/portal/us/home/support/details/printers/support-inkjet-printer/mg-series/pixma-mg2520
Click DRIVERS & DOWNLOADS button. Click the Download button under Recommended Downloads (MG2500 series Full Driver & Software Package (Windows 10/10 x64/8.1/8.1 x64/8/8 x64/7/7 x64/Vista/Vista64/XP)
Then open the downloaded file and follow the onscreen instructions to reinstall the printer. This will allow you to reinstall the printer on your computer.
If you have any difficulty on following the steps above, please let me know and I will continue to help you