Can not logout Okta using AWS Cognito

Hi guys,

I’m using okta as an Indentity provider woking with AWS Cognito.In my app, i’m using cognito’s authentication. When i logout my app, i cant logout okta. Single Logout was enabled on okta and IdP sign out flow was enabled on Cognito too. I got error permisson when trying navigate to okta login screen .I need some advices, anybody hepls me please !!

What value you have added for these parameters:
Single Logout URL, SP Issuer and Signature Certificate?