[nextcloud] can't connect because webview (saml)

did not show it.

nextcloud on android used webview and on my device is provided by Firefox Focus. According to this

but did not work either

2018/12/04 23:49:45 DEBUG : rclone: Version "v1.45-021-g26b5f55c-beta" starting with parameters ["./rclone" "-vv" "--user-agent" "Mozilla/5.0 (Linux; Android 5.1.1; Nexus 5 Build/LMY48B; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.65 Mobile Safari/537.36" "ls" "fw:"]
2018/12/04 23:49:45 DEBUG : Using config file from "/home/USER/.config/rclone/rclone.conf"
2018/12/04 23:49:46 ERROR : : error listing: couldn't list files: 405 Method Not Allowed
2018/12/04 23:49:46 Failed to ls: couldn't list files: 405 Method Not Allowed

I checked the nextcloud dir in /data/data/com.nextcloud.client/

/data/data/com.nextcloud.client/shared_prefs/com.nextcloud/client_preferences.xml
has an entry called pushToken
I tested the long string with --webdav-bearer-toke without success (same error as above)

There is also this two files that have nc, maybe related to [3]

/data/data/com.nextcloud.client/files/nextcloud/nc-keypair/
push_key.pub
push_ley.priv