steps to reproduce:
1. In syndesis, Customizations -> Upload OpenAPI Connectors -> Create API connector

2. Upload OpenAPI Document (Upload an OpenAPI file-> kie-server-swagger.json) -> Review Actions -> Review/Edit -> Add security scheme (Oauth2 / Access Code) -> Specify security page.

3. On specify security page, the Next button is enabled only after changing the input.
(see oauth2.gif)