Adding BooleanIndex via ZMI results in "NotFound"

Norbert via Plone Community wrote at 2024-1-29 13:07 +0000:

I noticed this in a Plone 5.1 site, and verified with Plone 6 Classic:
...
Traceback (innermost last):

Module ZPublisher.WSGIPublisher, line 181, in transaction_pubevents
Module ZPublisher.WSGIPublisher, line 391, in publish_module
Module ZPublisher.WSGIPublisher, line 269, in publish
Module ZPublisher.BaseRequest, line 532, in traverse
Module ZPublisher.HTTPResponse, line 974, in notFoundError

zExceptions.NotFound: https://mein.pnz.de/manage_addBooleanIndex

The URL looks wrong.

It should look like "/manage_addProduct/PluginIndexes/addBooleanIndex"