The OctoPrint log file indicates that the collections module has no attribute 'MutableMapping'. The issue is noted in issue #131 opened on the GitHub page for the Filament Manager plugin. The relevant text is:
"The error you're encountering is due to a compatibility issue with Python 3.10 or later. In these versions, the MutableMapping class has been moved from the collections module to the collections.abc module2. The plugin you're trying to install is likely using an outdated import statement that references collections.MutableMapping, which is no longer valid."
Presumably the source code could be modified to use the correct collections module, but that is not something that I would feel comfortable doing. I have decided to try the Spool Manager plugin for my OctoPrint instance on Bookworm. Is there a way to remove the Filament Manager plugin? It does not appear in the list of third party plugins.