fatal error and bug in wp

Hi,

I installed polylang, cf 7, cf 7 extension for polylang and smart grid.

I tried to add a new language to my website (currently I have 4, I tried to add german language), but inmediately wp goes in bug and I have to enter in safe mode and restore. When I delete the german language in polylang, everything starts to work again.

Here the error:

Un errore di E_ERROR è stato causato nella linea 346 del file /home/ij1z46hp/templarstravel.com/wp-content/plugins/cf7-polylang/admin/class-cf7-polylang-admin.php. Messaggio di errore: Uncaught Error: Class ‘ZipArchive’ not found in /home/ij1z46hp/templarstravel.com/wp-content/plugins/cf7-polylang/admin/class-cf7-polylang-admin.php:346 Stack trace: #0 /home/ij1z46hp/templarstravel.com/wp-includes/class-wp-hook.php(287): Cf7_Polylang_Admin->get_cf7_translations(”) #1 /home/ij1z46hp/templarstravel.com/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array) #2 /home/ij1z46hp/templarstravel.com/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #3 /home/ij1z46hp/templarstravel.com/wp-settings.php(409): do_action(‘plugins_loaded’) #4 /home/ij1z46hp/templarstravel.com/wp-config.php(94): require_once(‘/home/ij1z46hp/…’) #5 /home/ij1z46hp/templarstravel.com/wp-load.php(37): require_once(‘/home/ij1z46hp/…’) #6 /home/ij1z46hp/templarstravel.com/wp-login.php(12): require(‘/home/ij1z46hp/…’) #7 {main} thrown

Can you help me with that?

Thank you

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