Bug in the gradient pallete of illustrator

In the gradient palette, you can only change the slider and color as shown in the picture.
Buttons for changing opacity, angle, and partial color deletion using drop-down boxes are missing, making editing with this pallete is impossible. Though I can only use the gradient tool to edit, crazy hard to do so.

Does anyone know of a solution?

I tried restarting the PC, uninstalling and installing the application, etc.

Adobe Illustrator version: 26.4.1