Automatic kernel removal does not appear to be working

[cplittlfield]

Describe the bug
With automatic kernel removal enabled by going to Edit > Preferences > Automation and enabling "Remove obsolete kernels and dependencies" kernels older than the two most recent do not get removed.

Screenshots
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To Reproduce
Steps to reproduce the behavior:

1. Go to 'Edit > Preferences > Automation'
2. Click on 'Remove obsolete kernels and dependencies'
3. Scroll down to '....'
4. See error

Expected behavior
After waiting a week, the old kernels should no longer be listed as installed in Update Manager, and the kernel files should be gone from /boot

Distribution:

• Linux Mint
• LMDE
• Other (please specify)

Version 7.0.7 of mintUpdate

Logs:
Copy & paste the log output from Update Manager > View > Information here.

Crash report:
If you are reporting a crash, please run mintupdate from a terminal window, reproduce the crash and copy & paste any output from the terminal window here.

Additional context
I thought was just me, until I saw this thread on the forums: https://forums.linuxmint.com/viewtopic.php?p=2614790#p2614790

Locale:
If the problem is with text not getting displayed correctly, paste the output of the terminal command locale.

[linuxminty]

I have the same problem with Update Manager in Mint 22.1. Attached is a screenshot showing the number of old kernels still installed even though I've enabled the automatic removal feature in Update Manager's preferences

[Doc-Dish]

I have the same issue (starting with kernel version 6.8.0-52). Kernels are also not removed with apt autoremove --purge.

[Elliot4444]

Same issue with the 6.11 kernels on Linux Mint 22.1.