???

hello,

I come to you because it puts not configure google calendar every time I get an error 400:

400 That's an error.
Error: redirect_uri_mismatch
Application : Your *****
You can email the developer of this app at: ****@yahoo.fr
The redirect URI in the request: nomdusite.fr/administrator/index.php?opt...=google.authenticate did not match a registered redirect URI.

Can you help me
thank you