Customizing redirect after session expiration

Hello, We have a business client who would strongly prefer that the signing experience does not redirect to the OneSpan sign-up/login page after session expiration. They have correctly noted that when using the mobile experience there is no redirect, instead it simply tells you that your session has expired. Do we have any control to provide similar functionality with the non-mobile classic signers experience? Is there a more basic page without the signup/login that we can have it redirect to? I understand we can provide a custom redirect URL, however in this instance that isn't an option for us. Thank you in advance! Ron