I’m having this problem while trying to install build tools for ardupilot on my Mac. I reinstalled homebrew but it didn’t help. What should I do?
> brew tap ardupilot/homebrew-px4
>
> ==> **Tapping ardupilot/px4**
>
> Cloning into '/usr/local/Homebrew/Library/Taps/ardupilot/homebrew-px4'...
>
> remote: Enumerating objects: 242, done.
>
> remote: Total 242 (delta 0), reused 0 (delta 0), pack-reused 242
>
> Receiving objects: 100% (242/242), 305.35 KiB | 556.00 KiB/s, done.
>
> Resolving deltas: 100% (137/137), done.
>
> Error: Invalid formula: /usr/local/Homebrew/Library/Taps/ardupilot/homebrew-px4/px4-dev.rb
>
> px4-dev: Unsupported special dependency :java
>
> Error: Invalid formula: /usr/local/Homebrew/Library/Taps/ardupilot/homebrew-px4/kconfig-frontends.rb
>
> kconfig-frontends: Calling `sha256 "digest" => :tag` in a bottle block is disabled! Use `brew style --fix` on the formula to update the style or use `sha256 tag: "digest"` instead.
>
> Please report this issue to the ardupilot/px4 tap (not Homebrew/brew or Homebrew/core), or even better, submit a PR to fix it:
>
> /usr/local/Homebrew/Library/Taps/ardupilot/homebrew-px4/kconfig-frontends.rb:18
>
> Error: Invalid formula: /usr/local/Homebrew/Library/Taps/ardupilot/homebrew-px4/px4-sim.rb
>
> px4-sim: Unsupported special dependency :x11
>
> Error: Invalid formula: /usr/local/Homebrew/Library/Taps/ardupilot/homebrew-px4/fastrtps.rb
>
> fastrtps: Unsupported special dependency :java
>
> Error: Cannot tap ardupilot/px4: invalid syntax in tap!