This seems to be the relevant portion from autopkg run -vv com.github.jessepeterson.munki.VirtualBoxExtPack. I believe this started after the update to macOS 12.3.
MunkiImporter: No value supplied for MUNKI_REPO_PLUGIN, setting default value of: FileRepo
MunkiImporter: No value supplied for MUNKILIB_DIR, setting default value of: /usr/local/munki
MunkiImporter: No value supplied for force_munki_repo_lib, setting default value of: False
MunkiImporter: Using repo lib: AutoPkgLib
MunkiImporter: plugin: FileRepo
MunkiImporter: repo: /Volumes/Munki/munki_repo
'str' object has no attribute 'get'
Failed.
Receipt written to /Volumes/Munki/AutoPkg/Cache/com.github.jessepeterson.munki.VirtualBoxExtPack/receipts/com.github.jessepeterson.munki-receipt-20220320-075437.plist
The following recipes failed:
com.github.jessepeterson.munki.VirtualBoxExtPack
Error in com.github.jessepeterson.munki.VirtualBoxExtPack: Processor: MunkiImporter: Error: 'str' object has no attribute 'get'
The following new items were downloaded:
Download Path
-------------
/Volumes/Munki/AutoPkg/Cache/com.github.jessepeterson.munki.VirtualBoxExtPack/downloads/Oracle_VM_VirtualBox_Extension_Pack.vbox-extpack
This seems to be the relevant portion from autopkg run -vv com.github.jessepeterson.munki.VirtualBoxExtPack. I believe this started after the update to macOS 12.3.