Thank you your reading my blog DJANGO DEVELOPER !
I suggest checking your Facebook app settings to make sure that the URLs you specified match the URLs in your code.
Also, ensure that you have specified the correct callback URLs in your Facebook app settings. If the issue persists, you can try to search for similar issues on forums or stack overflow to see if anyone has encountered a similar problem.
Additionally, you can add more details about the error message to your question to help people provide more specific suggestions.