Copy-paste fix pattern
library CB-Storage
fn main() {
CB-Storage.write_text("notes.cb", "saved")
println(CB-Storage.read_text_or("notes.cb", ""))
}Why it happens
A file could not be read, written, copied, or decoded.
How to fix it
Check permissions, locks, path spelling, and whether the file is inside the project.
Runtime and Studio now show this kind of page from the error dialog: plain message first, stable code second, original details third.