Canon EOS 5D Mark IV Instruction Manual page 162

Responding to Error Messages
68: Cannot connect to wireless LAN terminal. Retry from
the beginning.
Did you hold down the access point's WPS (Wi-Fi Protected

Setup) button for the specified period of time?
 Hold down the WPS button for the period of time specified in the
access point's instruction manual.
Are you trying to establish a connection near the access

point?
Try establishing the connection when both devices are within reach

of each other.
69: Multiple wireless LAN terminals have been found.
Cannot connect. Retry from the beginning.
Connection is in progress by other access points in

Pushbutton Connection mode (PBC mode) of Wi-Fi Protected
Setup (WPS).
Wait a while before trying to establish the connection, or try to

establish a connection in PIN code connection mode (PIN mode)
(p.65).
91: Other error
A problem other than error code number 11 to 69 occurred.

Turn off and on the camera's power switch.

162