This Post will introduce some information you need to provide when asking questions, which can help us solve your problem faster and better.
This post will introduce some modes and common problems of IMX519 Quad-HAT. If the FAQ does not solve your problem, please start a separate topic to ask the question, and attach the following information:
This post describes how to use libcamera & imx519 on OctoPi Nightly build.
This post is used to explain some common problems with IMX519 and libcamera.