Fix: Cucumber won't start though cucumber.yml is correct

This is for you if you get this error:

cucumber.yml was found, but could not be parsed. Please refer to cucumber's documentation on correct profile usage.

Actually, it's likely that your cucumber.yml is just fine but not your rerun.txt.\
This sometimes happens when running multiple Cucumber workers with parallel_tests that write into rerun.txt simultaneously -- ending up with a messy, invalid file.

Just remove it and you are good to go again:

rm rerun.txt

Another possible solution is to have one rerun file per worker for which you'd need to modify your cucumber.yml accordingly.