Hi @danielg0987

• This error is likely occurring because the response from the server is not valid JSON
• Verify that the URL you are requesting is correct and that the server is set up to handle requests at that endpoint.
• If your localhost environment is having issues with CORS, make sure the server is configured to allow requests from your development domain

@danielg0987 - Verify the redirect_uri in Oauth registration and in the URL before embed/auth.html if you found any version number remove that value and verify the issue.

c11n/<Version>/embed/auth.html 

replace

c11n/embed/auth.html

Thank you.