Copy-paste fix pattern
library CB-Render
fn main() {
init_window(960, 540, "Render")
clear(0x071018)
draw_rect(20, 20, 120, 60, 0x65EFE0)
swap_buffers_fast()
}Why it happens
A rendering function received invalid arguments or ran before the window was ready.
How to fix it
Call init_window first and validate positions, sizes, colors, and font sizes.
Runtime and Studio now show this kind of page from the error dialog: plain message first, stable code second, original details third.