I can not access my wordpress site

I can not access my wordpress site!
this is the error that appears to me:

Warning: Unexpected character in input: ” (ASCII=18) state=0 in /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php on line 5413

Strict Standards: Only variables should be passed by reference in /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php on line 5377

Strict Standards: Only variables should be passed by reference in /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php on line 5377

Strict Standards: Only variables should be passed by reference in /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php on line 5377

Warning: Cannot modify header information – headers already sent by (output started at /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php:5413) in /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php on line 751

Warning: Cannot modify header information – headers already sent by (output started at /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php:5413) in /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php on line 751

Warning: Cannot modify header information – headers already sent by (output started at /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php:5413) in /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php on line 751

Warning: Cannot modify header information – headers already sent by (output started at /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php:5413) in /home/elenagat/public_html/wp-login.php on line 423

Warning: Cannot modify header information – headers already sent by (output started at /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php:5413) in /home/elenagat/public_html/wp-login.php on line 436

Warning: Cannot modify header information – headers already sent by (output started at /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php:5413) in /home/elenagat/public_html/wp-includes/pluggable.php on line 920

Warning: Cannot modify header information – headers already sent by (output started at /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php:5413) in /home/elenagat/public_html/wp-includes/pluggable.php on line 921

Warning: Cannot modify header information – headers already sent by (output started at /home/elenagat/public_html/wp-content/plugins/wp-cerber/cerber-load.php:5413) in /home/elenagat/public_html/wp-includes/pluggable.php on line 922

what should I do?

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