Erro ao Instalar Plugin em Wordpress

[Jander#]

Olá turma, estou tentando instalar um Plugin no meu Site, porém ao instalar ele compromete todo o mesmo com o seguinte erro:

Warning: fopen(/home1/hginf656/public_html/wp-content/plugins/wpcloaker/wpcloaker.php): failed to open stream: No such file or directory in /home1/hginf656/public_html/wp-includes/functions.php on line 5974

Warning: fread() expects parameter 1 to be resource, boolean given in /home1/hginf656/public_html/wp-includes/functions.php on line 5977

Warning: fclose() expects parameter 1 to be resource, boolean given in /home1/hginf656/public_html/wp-includes/functions.php on line 5980

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home1/hginf656/public_html/wp-includes/functions.php:5974) in /home1/hginf656/public_html/wp-content/plugins/wp_rgpd/index.php on line 1048

Warning: Cannot modify header information - headers already sent by (output started at /home1/hginf656/public_html/wp-includes/functions.php:5974) in /home1/hginf656/public_html/wp-includes/functions.php on line 6221

Warning: Cannot modify header information - headers already sent by (output started at /home1/hginf656/public_html/wp-includes/functions.php:5974) in /home1/hginf656/public_html/wp-admin/includes/misc.php on line 1259

Warning: Cannot modify header information - headers already sent by (output started at /home1/hginf656/public_html/wp-includes/functions.php:5974) in /home1/hginf656/public_html/wp-admin/admin-header.php on line 9

 

Alguém poderia me orientar a resolver?

 - Atualizações:

WP: 5.4

PHP: 7.1

 

Desde já Muito grato.