Two Problems with Unity

Hi. I’m making a 2d game and I have encountered two problems. One, I made a skybox, with the Skybox/Procedural shader on it. However, for some reason, it is all black as shown in the image below.

Another problem is that each time I pan around in the scene view, everything starts glitching, as shown in the image below.

And then, after a few seconds, the mess goes away.

So could anyone please help me fix these two problems? Thanks.

Note that I’m using URP

Is your camera Clear Flags set to anything but Skybox?