• I have visited the [source website], and in particular
  read the [known issues]
• I have searched through the [issue tracker] for duplicates
• I have mentioned version numbers, operating system and
  environment, where applicable:

>>> import tqdm, sys
>>> print(tqdm.__version__, sys.version, sys.platform)
4.28.1 3.6.7 |Anaconda, Inc.| (default, Oct 23 2018, 14:01:38)
[GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)] darwin

Similar to the closed issue - #184, but in this case tqdm throws an error when we call .set_description on a progress bar that is disabled.