Error: undefined method `parse' for class JSON::Ext::Parser

[alphavector]

Output of brew config

HOMEBREW_VERSION: 4.4.16
ORIGIN: https://github.com/Homebrew/brew
HEAD: 4c9de7d31c6d9e67c4496c3c156e84c3649fec4c
Last commit: 2 days ago
Branch: stable
Core tap JSON: 15 Jan 21:06 UTC
Core cask tap JSON: 15 Jan 21:06 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_EDITOR: vim
HOMEBREW_MAKE_JOBS: 10
Homebrew Ruby: 3.3.6 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.3.6/bin/ruby
CPU: 10-core 64-bit arm_firestorm_icestorm
Clang: 16.0.0 build 1600
Git: 2.39.5 => /Library/Developer/CommandLineTools/usr/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 15.2-arm64
CLT: 16.2.0.0.1.1733547573
Xcode: N/A
Rosetta 2: false

Output of brew doctor

Error: undefined method `parse' for class JSON::Ext::Parser
/opt/homebrew/Library/Homebrew/vendor/bundle/ruby/3.3.0/gems/json-2.9.1/lib/json/common.rb:221:in `parse'
/opt/homebrew/Library/Homebrew/os/mac/sdk.rb:124:in `read_sdk_version'
/opt/homebrew/Library/Homebrew/os/mac/sdk.rb:61:in `block in all_sdks'
/opt/homebrew/Library/Homebrew/os/mac/sdk.rb:58:in `each'
/opt/homebrew/Library/Homebrew/os/mac/sdk.rb:58:in `all_sdks'
/opt/homebrew/Library/Homebrew/extend/os/mac/diagnostic.rb:460:in `check_broken_sdks'
/opt/homebrew/Library/Homebrew/cmd/doctor.rb:59:in `block in run'
/opt/homebrew/Library/Homebrew/cmd/doctor.rb:52:in `each'
/opt/homebrew/Library/Homebrew/cmd/doctor.rb:52:in `run'
/opt/homebrew/Library/Homebrew/brew.rb:94:in `<main>'
Please report this issue:
  https://docs.brew.sh/Troubleshooting

Description of issue

brew stopped working altogether