Looking for logging into the Owncloud 8.2 Cant site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Owncloud 8.2 Cant site. After that you can login as usual with your login credentials.
https://forum.owncloud.org/viewtopic.php?t=37312
https://doc.owncloud.org/server/8.2/admin_manual/issues/index.html
https://central.owncloud.org/t/after-upgraded-9-1-1-old-local-user-cant-log-in/3782
https://central.owncloud.org/t/login-im-browser-nicht-moglich/5012
https://help.nextcloud.com/t/users-cannot-login-via-webinterface-after-upgrade-from-owncloud-8-2-10-to-nextcloud-9-0-57/11306
https://doc.owncloud.com/server/8.2/admin_manual/maintenance/update.html
https://github.com/owncloud/core/issues/21803
https://www.clearos.com/clearfoundation/social/community/owncloud-not-working-after-upgrade
https://forum.multcloud.com/discussion/308/cant-get-owncloud-8-2-2-to-link-in
https://serverfault.com/questions/766504/unable-to-login-to-mysql-on-owncloud-using-php-sqlstate28000-1045-access-d
https://de.wikipedia.org/wiki/OwnCloud
https://decatec.de/home-server/nextcloud-migration-von-owncloud/
https://help.univention.com/t/update-ucs-with-owncloud-9/5419