Update to 11.10.1 broke site because of Admin Toolbar 3.4.1

Problem/Motivation

I updated to OS 11.10.1 tonight, and got a WSOD. Looking at logs gave me this error:
Uncaught PHP Exception UnexpectedValueException: "base:admin/reports/data-policy-agreements has no corresponding route." at /home/servantlead/public_html/site/html/core/lib/Drupal/Core/Url.php line 567

My Google-fu took me to this page - https://www.drupal.org/project/admin_toolbar/issues/3380953 🐛 base:block has no corresponding route Fixed - where it seemed like Admin Toolbar 3.4.1 was the culprit (post #5 in that page shows the same error message I got, re: admin/reports/data-policy-agreements) .

Looking in OS's composer.json, sure enough it's now requiring admin_toolbar 3.4.1

Steps to reproduce

Install OS 11.10.1 (or just install Admin Toolbar 3.4.1). It may produce a WSOD.

Proposed resolution

I applied the patch from post #3 in the linked page, and my site worked fine again. Currently waiting on a new tagged release of Admin Toolbar.