TypeError: argument of type 'Redirect' is not iterable

[cclauss]

When running OpenLIbrary on Python 3.9.0...

web_1        | 0.0 (1): SELECT * FROM thing WHERE key='/people/openlibrary7353'
web_1        | Traceback (most recent call last):
web_1        |   File "/home/openlibrary/.pyenv/versions/3.9.0/lib/python3.9/site-packages/web/application.py", line 278, in process
web_1        |     return p(lambda: process(processors))
web_1        |   File "/openlibrary/infogami/utils/delegate.py", line 71, in layout_processor
web_1        |     if 'title' not in out:
web_1        | TypeError: argument of type 'Redirect' is not iterable