Error after updating to 4.0.18 (3dabf504b): uninitialized constant Cask::Migrator

[hundehausen]

brew doctor output

Your system is ready to brew.

Verification

• My "brew doctor output" above says Your system is ready to brew. and am still able to reproduce my issue.
• I ran brew update twice and am still able to reproduce my issue.
• This issue's title and/or description do not reference a single formula e.g. brew install wget. If they do, open an issue at https://github.com/Homebrew/homebrew-core/issues/new/choose instead.

brew config output

HOMEBREW_VERSION: 4.0.18-4-ga734170
ORIGIN: https://github.com/Homebrew/brew
HEAD: a734170b83d2e4182060d1a96b55986b38c82aed
Last commit: 2 minutes ago
Core tap JSON: 14 May 19:02 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_MAKE_JOBS: 10
Homebrew Ruby: 2.6.10 => /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
CPU: 10-core 64-bit arm_firestorm_icestorm
Clang: 14.0.3 build 1403
Git: 2.39.2 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 7.87.0 => /usr/bin/curl
macOS: 13.3.1-arm64
CLT: 14.3.0.0.1.1679647830
Xcode: N/A
Rosetta 2: false

What were you trying to do (and why)?

brew update

What happened (include all command output)?

brew update
==> Updated Homebrew from 3dabf50 to a734170.
Updated 1 tap (homebrew/cask).
==> New Casks
kiibohd-configurator
Error: uninitialized constant Cask::Migrator
Please report this issue:
https://docs.brew.sh/Troubleshooting
/opt/homebrew/Library/Homebrew/cmd/update-report.rb:591:in block in migrate_cask_rename' /opt/homebrew/Library/Homebrew/cmd/update-report.rb:590:in each'
/opt/homebrew/Library/Homebrew/cmd/update-report.rb:590:in migrate_cask_rename' /opt/homebrew/Library/Homebrew/cmd/update-report.rb:250:in each'
/opt/homebrew/Library/Homebrew/cmd/update-report.rb:250:in output_update_report' /opt/homebrew/Library/Homebrew/cmd/update-report.rb:41:in update_report'
/opt/homebrew/Library/Homebrew/brew.rb:94:in `

'

What did you expect to happen?

brew updates

Step-by-step reproduction instructions (by running brew commands)

brew update

[apainintheneck]

This was fixed in #15426.