download tag using perl issue *HELP*

i try to download same image using perl
and i get these

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Use of ?PATTERN? without explicit operator is deprecated at booru.pl line 72.
logging in ... failed to login: Couln't POST tp http://danbooru.donmai.us/user/authenticate: 404 not found
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what can i do

No wonder - http://danbooru.donmai.us/user/authenticate doesn't exist anymore, it's /session now. And you should probably ask the one who wrote booru.pl, it seems obsolete.