Cannot login to Nextcloud with correct admin password

Please check the web console as described in the support template, while attempting to log in.

Also, do you have any errors or warnings under Admin settings-Overview?

Lastly, is there a reason you’re using both Redis and MemcacheD? That is unusual.

  'memcache.local' => '\\OC\\Memcache\\Redis',
  'memcache.distributed' => '\\OC\\Memcache\\Memcached',
  'memcached_servers' =>
  array (
    0 =>
    array (
      0 => '127.0.0.1',
      1 => 11211,
    ),
  ),
  'overwrite.cli.url' => 'https://192.168.1.9',
  'memcache.locking' => '\\OC\\Memcache\\Redis',