Invenio v3.2.2 fixes issues with incompatibilities with several libraries: - WTForms recently release has moved email_validator to an optional dependency. It has been added in the corresponding packages. - SQLAlchemy-Utils v0.36 breaks compatibility of Invenio models with MySQL. It enforces setting the length on type VARCHAR. - Sphinx v3.0+ breaks the build of documentation, due to a Flask context issue. - Flask is now provided as a centrally managed dependency from Invenio-Base.
Invenio v3.2.2 support Python version 3.5 and 3.6. Python 2 support in Invenio ended on January 1st, 2020 with the official end of life for Python 2 on the same date.
Example applications have started to be removed from the Invenio modules, and they are not supported anymore.