[MM3-users] Mass subscription: HTTP Error 400: 'pathlib._local.PosixPath' object does not support the context manager protocol

Hi,

Debian trixie, virtualenv installation: When I entered addresses at the mass subscription field I got:

HTTP Error 400: 'pathlib._local.PosixPath' object does not support the context manager protocol

The addresses were subscribed though.

How can I have subscription working correctly?

I haven't found anything reasonable on the Internet. Thank you for your help!

Flo