Thank you for the information you have provided. Is it the Mavic Pro or the Mavic 2 Pro you are using?
You will not be to connect to your drone with Pix4Dcapture using the Wifi.
The error displayed has not been reported so far but it should be solved by connecting the proper way to the drone.
To connect, you need to use a USB cable and plug it between the mobile device you are using and the remote controller of the drone. It can take several attempts to connect to the drone, do not hesitate to restart everything from scratch if it can not connect.
Then be sure:
To use the latest version of Pix4Dcapture and Ctrl+DJI
To select the good drone in the settings
To not have DJI GO 4 set to open by default (it seems that you checked it)
To not have DJI GO 4 open in the background. Force quit it if necessary.
If still having issues, I would suggest you have a close look at this article and to go through our troubleshooter.
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