Login difficulties KoboCollect

Welcome to the community, @lhp! Kindly please check your URL configuration under the Settings>Server from your Collect Android App. It seems like there is a typo in it.

The correct URL should be:
https://kc.kobotoolbox.org

But seems like you configured it as follows:
Https://kc.kobotoolbox.org

Where the initial H is in uppercase. Fix this and that should solve your issue.