Please help me rddcoin

please help me i have a problem my core wallet i stored rddcoin last 3 years sudendly i checked but not open my core wallet i have lost i think please help me recover my reddcoin what is problem my core wallet showing errorrdd%20error

Backup wallet.dat first (C:\Users<user_id>\AppData\Roaming\Reddcoin). Delete any content from Reddcoin folder (except wallet.dat) and start Reddcoin Core wallet. Now Blockchain will be downloaded again so you have to wait for sync.

Just delete blocks and chainstate folders from %AppData%/Reddcoin