Error while styling the playground components

[anishagg17]

 <Error msg={params.errorProps.msg} isPopup
        overrides={{
            style: {
              color: '#892C21',
            },
        }}
      />

I tried changing the default theme of the playground components such as error message, checkboxes, sliders but faced errors. Is there something wrong with my implementation.

even setting up className renders error