allow-same-origin error even after adding attribute to iframe

[Shanawaz579]

Working on LookerEmbedSDK  , added the  allow-same-origin attribute to  sandbox  but still getting allow-same-origin error

Please find the attachment for more details
 Code

LookerEmbedSDK.createDashboardWithId(dashboardId).withSandboxAttr('allow-same-origin', 'allow-scripts', 'allow-popups', 'allow-forms')