Can’t login into admin

Hi,

I re-actived the plugin to find I had the follwoing header text showing on my webpage

define('WP_CACHE', true); define( 'WPCACHEHOME', '/homepages/8/d747518464/htdocs/clickandbuilds/UKNimlok/wp-content/plugins/wp-super-cache/' );

I’m now unable to deactive/remove the plugin or even log into my admin screen. I receive the following error on my admin login screen.

Define('WP_CACHE', true); define( 'WPCACHEHOME', '/homepages/8/d747518464/htdocs/clickandbuilds/UKNimlok/wp-content/plugins/wp-super-cache/' );
Warning: Cannot modify header information - headers already sent by (output started at /homepages/8/d747518464/htdocs/clickandbuilds/UKNimlok/wp-config.php:1) in /homepages/8/d747518464/htdocs/clickandbuilds/UKNimlok/wp-includes/pluggable.php on line 1265

Warning: Cannot modify header information - headers already sent by (output started at /homepages/8/d747518464/htdocs/clickandbuilds/UKNimlok/wp-config.php:1) in /homepages/8/d747518464/htdocs/clickandbuilds/UKNimlok/wp-includes/pluggable.php on line 1268

Please can someone advise?

Thanks

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