Using 2021 Release 1.1 on macOS Big Sur 11.3.1 on Intel.
The program runs fine when I choose “Run”, but I get an error on “Build”: Compilation of “MyProgram” failed. A file system error occurred (#0) for “MyProgram”. If the application already exists, please make sure that it is not currently running, otherwise please make sure that the destination directory is writable. I’m writing to a dropbox folder on my computer. I’m running Bitdefender anti-virus, but turned it off to test after this problem occurred. The program is not running.