Copy-paste fix pattern
compile cba input.cbp bin/app.cba small computeWhy it happens
A .cb, .cba, .cbl, .dll package, or embedded overlay does not match the expected ClosedBit format.
How to fix it
Rebuild from source and do not edit compiled artifacts by hand.
Runtime and Studio now show this kind of page from the error dialog: plain message first, stable code second, original details third.