Site crashed with new version

Hello,
I was update the plugin to the lastest version and now i can’t do nothing i have juste an error message : Fatal error: Call to undefined function register_block_type() in /var/www/html/wp-content/plugins/uji-countdown/src/blocks.php on line 65

I think i need to modifie the blocks.php file but i don’t know what i need modify.

Somebody have the same erreur ?
Thank u

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