The operation couldn’t be completed. (SimpleumCoreMacOS.KeychainPasswordItem.Keychain error 0.)

If you have denied the access to the keychain and want to change it now, use the following steps:

1. Close SimpleumSafe
2. Start the “Terminal” Program
3. Enter “security delete-generic-password -l worksparse.sparsebundle”
   in Terminal and press enter
4. Start SimpleumSafe again. Now you will be prompted again to allow access to the keychain. Confirm with your Mac system password.