(Filling out the following details about bugs will help us solve your issue sooner.)

pip freeze | grep slack
python --version
sw_vers && uname -v # or `ver`

(Paste the output of pip freeze | grep slack)

(Paste the output of python --version)

(Paste the output of sw_vers && uname -v on macOS/Linux or ver on Windows OS)

(Share the commands to run, source code, and project settings (e.g., setup.py))

(Tell what you expected to happen)

(Tell what actually happened with logs, screenshots)

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