Install gir1.2-gmime-2.6 by entering the following commands in the terminal:
sudo apt update sudo apt install gir1.2-gmime-2.6
Description:
MIME parser and creator (old 2.6 version) - GObject introspection data
GMime provides a core library and set of utilities which may be used for the creation and parsing of messages using the Multipurpose Internet Mail Extension (MIME). . This package contains data for using the older version of GMime under GObject introspection (e.g. Python). . It is recommended to use gir1.2-gmime-3.0 instead of this package.
Homepage: https://github.com/jstedfast/gmime/
Version: 2.6.23+dfsg1-2
Section: universe/introspection