Failed to load cask: ./qwt.rb Cask 'qwt' is unreadable: wrong constant name #<Class:0x000000012f2b9398>

`--ignore-dependencies` is an unsupported Homebrew developer option! Adjust your PATH to put any preferred versions of applications earlier in the PATH rather than using this unsupported option!

Treating ./qwt.rb as a formula.

qwt 6.3.0 is available and more recent than version 6.2.0.

Unexpected input(s) 'fetch', valid inputs are ['repository', 'ref', 'token', 'ssh-key', 'ssh-known-hosts', 'ssh-strict', 'persist-credentials', 'path', 'clean', 'fetch-depth', 'lfs', 'submodules', 'set-safe-directory']

Unexpected input(s) 'fetch', valid inputs are ['repository', 'ref', 'token', 'ssh-key', 'ssh-known-hosts', 'ssh-strict', 'persist-credentials', 'path', 'clean', 'fetch-depth', 'lfs', 'submodules', 'set-safe-directory']

pkgconf 2.3.0_1 is already installed and up-to-date. To reinstall 2.3.0_1, run: brew reinstall pkgconf