Completion in zsh doesn't work

[Turiok]

ZSH version : zsh 5.9 (x86_64-pc-linux-gnu)
transcrypt version : transcrypt 2.3.0-pre (main branch up to date)

When I try to add completion from contrib, I have this error when I

$>transcrypt                                                                                                                                                                                                                             
_arguments:comparguments:327: invalid argument: (--set-openssl-path -c --cipher -d --display -f --flush-credentials -p --password -r --rekey){--set-openssl-path}[use OpenSSL at this path]
_arguments:comparguments:327: invalid argument: (--set-openssl-path -c --cipher -d --display -f --flush-credentials -p --password -r --rekey){--set-openssl-path}[use OpenSSL at this path]