Step 1. Please restore the database again from the backup.
Step 2. Please execute below query to check whether this table exists or not :
select * from CfgCustomerDisplayFeedbackresult
Above table not there as you informed yesterday.
Step 3. If above table not there please execute below script on the fresh restored database :
CREATE TABLE [dbo].[CfgCustomerDisplayFeedbackResult](
[FeedbackResultKey] [bigint] NOT NULL,
[TransactionKey] [bigint] NULL,
[QuestionsKey] [bigint] NOT NULL,
[SelectedValue] [nvarchar](250) NOT NULL,
[Created] [datetime] NOT NULL,
[CreatedBy] [bigint] NOT NULL,
[Modified] [datetime] NOT NULL,
[ModifiedBy] [bigint] NOT NULL,
[IsDeleted] [bit] NOT NULL,
CONSTRAINT [PK_CfgCustomerDisplayFeedbackResult] PRIMARY KEY CLUSTERED
(
[FeedbackResultKey] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 80) ON [PRIMARY]
) ON [PRIMARY]
GO
Step 4. Once this table 'CfgCustomerDisplayFeedbackresult' created, please check and verify it.
Step 5. Now run the iVend installer.