# ownCloud User Manual

# Troubleshooting

## BlackBerry OS 10.2

BlackBerry OS up to 10.2.2102 does not accept a URL with protocol `https://` in front of the server address. It will always tell you, that it cannot login on your server. So instead of writing

> https://address/remote.php/carddav/principals/username

in the server address field, you have to write

> address/remote.php/carddav/principals/username