@Harshita It seems like an API related problem. May be there is a customization or change on the API version on your store. Could you please create a support case with Acumatica, so our team can check what is going on there?

Hi @Harshita were you ever able to resolve your issue? Thank you!

When i am trying to get my access token it is giving me an "error": "invalid_request" i have provided all the parameters correctly in my postman still encountering this issue can you please tell me how to resolve this i have followed authorization code flow.