Copy-paste fix pattern
library CB-Render
fn main() {
init_window(640, 360, "ClosedBit Window")
clear(0x071018)
draw_text(24, 24, "Ready", 0xFFFFFF, 24)
swap_buffers_fast()
}Why it happens
A function call is not built in, not defined in the source, and not exported by a loaded library.
How to fix it
Add the required library, define the function before calling it, or correct the function name.
Runtime and Studio now show this kind of page from the error dialog: plain message first, stable code second, original details third.