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Helloto every one, im fairly new here. So i am doing some doodling around with some circuit and the program gave me the attached error message. I dont know what that means or whre to search for the problem.
Any help is appreciated.

Hi,
The message is pretty self-explanatory. You have AND gate that are located at point 30x20 on the grid. It has input pin named x1 - probably second from the top, if you did not rotate it. This pin is connected output of more than one other gates.
In order to locate the AND gate in question click on any of them and look at the bottom on the status bar of the program. You will see coordinates of the selected gates.
I'd recommend you to read help pages at: https://logiccircuit.org/help.html
Hope it's cleared up things for you,
Eugene