Hi I tried to use install but my website crashed during the configuration of the plugin

Bellow the issue i got, i changed my webite url by "mysite.com". Any good idea ?
I had to restore it. I got this error :
Fatal error: Cannot redeclare icl_t() (previously declared in /home/customer/www/mysite.com/public_html/wp-content/plugins/polylang/modules/wpml/wpml-legacy-api.php:289) in
/home/customer/www/mysite.com/public_html/wp-content/plugins/wpml-string-translation/inc/functions.php on line
481