Please help us by providing the following info. Before posting please also check the pinned "Known issues" threads and make sure that you're running the latest available version for your oC release: https://owncloud.org/changelog/
Tell us what should happen
"web services under your control" in the web UI's picture:
I find the login.php in the fold(owncloud\updater\src\Resources\views\partials).
But the code in the login.php doesn't run.
Tell us what happens instead
ownCloud version (see ownCloud admin page):9.0.1