Here we will explain how to fix this error step by step:
Close the wallet if it is still open.
Navigate to you appdata folder. In this example we will show you how to go to the default installation folder. a. For Windows open a windows explorer window and enter this in the address bar: %appdata% and find the folder prcycoin b. For Mac the folder is located in/Library/Application Support/PRCYcoin
Rename the file wallet.dat to wallet.corrupt.dat.
Go to the backups folder. You will see backup file with a timestamp behind the name. Copy one of those, I suggest the oldest, one folder up.
Rename the file you just copied to wallet.dat, without the timestamp.
Start your wallet again and enter your passphrase.
It may appear unresponsive for a bit until it scans the remaining blocks. You can check this progress in debug.log