When attempting to log into Kukai using Twitter, it is important to make sure that the device you are using is compatible with the platform. As mentioned, both an iPhone/Safari and Mac/Chrome combination have been tested and work fine. However, if you are using a different device or browser, it is important to make sure that it is compatible with the platform. Additionally, make sure that you are not using incognito mode, as this will not work, and make sure that you do not have any popup blockers, as these can interfere with Oauth social logins.