PHP Error after creating site

I always get this error after creating a site with hyphens:

Warning: fopen(/www/htdocs/w0116cec/websites/wp-content/plugins/EMPTY): failed to open stream: No such file or directory in /www/htdocs/w0116cec/websites/wp-includes/functions.php on line 3666

Warning: fread() expects parameter 1 to be resource, boolean given in /www/htdocs/w0116cec/websites/wp-includes/functions.php on line 3669

Warning: fclose() expects parameter 1 to be resource, boolean given in /www/htdocs/w0116cec/websites/wp-includes/functions.php on line 3672

Warning: Cannot modify header information - headers already sent by (output started at /www/htdocs/w0116cec/websites/wp-includes/functions.php:3666) in /www/htdocs/w0116cec/websites/wp-includes/pluggable.php on line 896