Never before,I dont know why
(I make a custom theme for Godot editor by theme.tres,and load this file in editor-setings
(It can load my theme while the project is already open,but when open next time the Godot engine be crash.
(This problem happened after one day I download some Godot theme at other site, and installed python eviroment.
That can only be opened my project if i deleted my theme.tres file to cause it reload default theme.