Invoke-WebRequest error Parameter LandingPage is not be null Parameter loginPageId is not valid

Hi, I have been using "AST Write Batch PS5.ps1" successfully, however it is throwing following error now.

PS C:\Users\administrator.CORE> $response = Invoke-WebRequest https://graph.microsoft.com/beta/security/attacksimulation/simulations -Method 'POST' -Headers $headerParams -Body $requestBody -TimeoutSec 120 Invoke-WebRequest: {"error":{"code":"UnknownError","message":"{\"Code\":400,\"Message\":\"Bad request\",\"Target\":null,\"Details\":[{\"Code\":400,\"Message\":\"Parameter LandingPage is not be null\",\"Target\":null,\"Details\":null,\"InnerError\":null},{\"Code\":400,\"Message\":\"Parameter landingPageId is not valid\",\"Target\":null,\"Details\":null,\"InnerError\":null},{\"Code\":400,\"Message\":\"Parameter LoginPage is not be null\",\"Target\":null,\"Details\":null,\"InnerError\":null},{\"Code\":400,\"Message\":\"Parameter loginPageId is not valid\",\"Target\":null,\"Details\":null,\"InnerError\":null}],\"InnerError\":null}","innerError":{"date":"2024-09-10T13:10:19","request-id":"af2c126b-b226-4ac4-8d30-152cf1e39c40","client-request-id":"af2c126b-b226-4ac4-8d30-152cf1e39c40"}}} PS C:\Users\administrator.CORE>

Any help on this would be much appreciated, thank you.

Locate AST Write Batch PS5.ps1 and trace the request sent to https://graph.microsoft.com/beta/security/attacksimulation/simulations, focusing on how $requestBody supplies landingPage and loginPage values. Compare that request with the current Attack Simulation Training API requirements and reproduce the validation error. Done should identify the cause and establish the appropriate script change or user guidance.