Hi gregology,
Err11 comes up when the camera is not detecting the device you are trying to connect to. Generally that will come up if the connection drops or if the set up times out.
There are a couple of things to check with an issue like this. The first is the network the camera and computer are on. If they aren't on the exact same network they will not be able to detect each other. it would be good to try having the computer join the camera's network.
1) Press the wifi button on the camera, select Wi-Fi/Bluetooth Connection, and select Remote Control (EOS Utility).
2) Select Add a Device to Connect to and now the camera should be showing an SSID and Password. Leave that screen on the camera.
3) On your computer pull up nearby wifi networks and you should see one that matches the SSID listed on the camera. Select that network and enter the password listed on the camera.
4) Once the computer is on the network open the EOS Utility and select Pairing Over Wi-Fi/LAN. At that point the EOS Utility will do a search of the network. Once it detects the camera select it and then the rear LCD on the camera will update to ask if you want to connect to the computer. Select Okay and that will finalize the connection.
If the connection is dropping that way the next thing to try would be to install the EOS Utility on a different computer and check to see if the same thing happens. Sometimes operating system or security software settings can block the connection and the best way to test that would be to try a different computer. If the connection works on a different computer that indicates settings on the first computer are causing the issue. In that case we would recommend contacting the maker of your operating system and security software to trouble shoot their settings.
If the issue is happening with every computer you try to connect to that can be a sign there is an issue with the camera. In that case which step in the process is failing, and what screen was on the camera before the connection failed?
