Error Server Error Something went wrong processing your request.

I am getting error with this URL:

https://www.zotero.org/settings/keys/new?oauth=1&client_id=***&redirect_uri=http://127.0.0.1:8000/api/zotero/callback/&response_type=code

can anyone tell me whats wrong? the client_id is set to
Client Key from what I get here: https://www.zotero.org/oauth/apps

Thank you :)
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