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Error: Cannot run program "{busybox}"

I upgraded from Arduino Core STM32 2.7.1 to 2.8.0 and now getting this error when uploading a sketch.
GitHub

stray '\342' in program error

sketch_nov09a:13:12: error: stray '\200' in program sketch_nov09a:13:13: error: stray '\234' in program sketch_nov09a:13:29: error: stray '\342' in program sketch ...