in block tools i hit block design box and i get "Database query error"

in block tools i hit block design box and i get "Database query error" why am I getting this? Do i need to add some thing

You need to check your debug email for the full database error report or turn on debugging.

To turn on full debug mode do the following.

/inc/classes/BxDolDb.php

and change

define( 'DB_FULL_DEBUG_MODE', false );

to

define( 'DB_FULL_DEBUG_MODE', true );

Then post the error message above the words Debug Backtrace. The rest will not be needed. With the actual error we cannot help.