Metadata-generation-failed

[MepHist2721Y]

Why this error... Please help.

Collecting mailer
Using cached mailer-0.8.1.zip (6.5 kB)
Preparing metadata (setup.py) ... error
error: subprocess-exited-with-error

× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> [1 lines of output]
error in mailer setup command: use_2to3 is invalid.
[end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

[Thomas750-al]

Hi