connect camera to telescope

Just figured out to connect camera to a telescope with an adapter ,you have to have camera in manual mode or you will get a lens error message.
I'm new to astrophotography,i had my Nikon d3400 in auto mode,it was driving me crazy.
hope this helps someone.

Welcome aboard. Enjoy the ride.
We look forward to seeing more posts and samples of your work.

I am assuming you are replacing the telescope eyepiece with your camera and not just piggybacking your camera on the telescope. If so, this is what I would expect since the telescope cannot send aperture data to the camera.