Generate nonce for Button to connect with eventbrite

Hi,

I like to let users add their eventbrite events to my site. So I use this url to connect my APP to their event:
https://www.eventbrite.com/oauth/authorize?response_type=token&client_id=YOUR_CLIENT_KEY

I am now redirected to the eventbrite login, do the login, and then I am redirected to my wordpress page and get this message:

Invalid/missing Keyring core nonce. All core actions require a valid nonce.

How can I generate and integrate this nonces in my url?

In the keyring settings I can see that there are two nonces

https://realmaker-dev.de/wp-admin/tools.php?page=keyring&action=request&kr_nonce=XXXXXXXXX&nonce=XXXXXXXXXX&service=eventbrite

Thanks

Michael

https://www.ads-software.com/plugins/keyring/