Salesforce CRM integration error

[konijetisumanth]

Hi All i am facing the below error , could anyone help in figuring out this error plz, i am getting this issue when crating the OAuth 

[Sanjay191 · Accepted solution]

Hello @konijetisumanth 
Please check the all the scope are given or not and also please check salesforce side scopes as well what all scopes are given and check access level as well in salesforce side 

If my answer has helped with your question, please mark my answer as accepted solution and give a thumb up.
Thank You

[Sanjay191 · Accepted solution]

Hello @konijetisumanth 
Please check the all the scope are given or not and also please check salesforce side scopes as well what all scopes are given and check access level as well in salesforce side 

If my answer has helped with your question, please mark my answer as accepted solution and give a thumb up.
Thank You

[konijetisumanth · Accepted solution]

When the salesforce is have MFE enable this is the erro expected 

solution :- 

Turn off "Require Proof Key for Code Exchange (PKCE) Extension for Supported Authorization Flows" checkbox in your Connected App's settings. It is located under the Scopes and Callback URLs (at least in old UI).