This error message suggests that there is a custom object in your Salesforce setup with the API name "Laptop_Warranty" that cannot be found.

Here are a few possible reasons why this error could be occurring:

The custom object may have been deleted or is no longer accessible to your user.

The custom object may not have been properly deployed to the correct Salesforce environment.

There may be a typo in the API name of the custom object, such as an incorrect capitalization.

The custom object may have been created under a different Salesforce organization or namespace.

To resolve this issue, you'll want to verify that the custom object exists in your Salesforce setup and that you have the proper permissions to access it. If the custom object does exist, you may need to double-check the API name to ensure it's correct, and if it doesn't exist, you may need to create it or ask an administrator to do so.