brew tap gravitl/netclient show an error

[vv1vv2]

when I want to install netclient by brew, showed an error after execute tap command. my device is mac m1

[vv1vv2]

Error: Invalid cask: /opt/homebrew/Library/Taps/gravitl/homebrew-netclient/Casks/netclient.rb
Cask 'netclient' is unreadable: /opt/homebrew/Library/Taps/gravitl/homebrew-netclient/Casks/netclient.rb:3: unexpected fraction part after numeric literal
version 0.14.2
^~~~
Error: Cannot tap gravitl/netclient: invalid syntax in tap!