Unknown Exception: database.error


how do i resolve this error

i have installed and i got the succesfull message but when accessing my website or admin iam getting this error,
i have counter checked the database settings and reinstalled it but this error keeps on coming.

A database error occurred while performing the requested procedure. Please review the database error below for more information.

C:/wamp64/www/ushaidi/system/libraries/drivers/Database/Mysqli.php [159]:

Unknown Exception: database.error


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