Canon EOS 1D X Mark II - Manual (Page 100)

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If a problem occurs, first refer to this Troubleshooting Guide to check
the camera and connected device. If this Troubleshooting Guide does
not resolve the problem, contact the nearest Canon Service Center.
To transfer captured images to an FTP server, set the Live View
shooting/Movie shooting switch to <A>.
When the Live View shooting/Movie shooting switch is set to
<k>, images cannot be transferred.
Even with a combination of the same camera and smartphone, if
you have changed the settings or selected a different setting,
reconnection may not be established even after selecting the same
SSID. In such a case, delete the camera connection settings from
the Wi-Fi settings on the smartphone and set up a connection
again.
If Camera Connect is left running while setting up a connection
again, the connection may not be established. In such a case,
restart Camera Connect.
Troubleshooting Guide
Cannot transfer images to an FTP server.
Cannot reconnect to a smartphone.