Failed to load cask: ./qwt.rb Cask 'qwt' is unreadable: wrong constant name #<Class:0x0000000124debd70>

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']

Treating ./qwt.rb as a formula.

qwt 6.3.0 is available and more recent than version 6.2.0.