<br />
<b>Warning</b>:  Constant NULL already defined in <b>/homepages/39/d30171830/htdocs/de/wp-content/themes/grey-opaque/functions.php</b> on line <b>69</b><br />
<!DOCTYPE html>
<html class="<br />
<b>Fatal error</b>:  Uncaught Error: Non-static method greyopaque_browser::css() cannot be called statically in /homepages/39/d30171830/htdocs/de/wp-content/themes/grey-opaque/header.php:11
Stack trace:
#0 /homepages/39/d30171830/htdocs/de/wp-includes/template.php(783): require_once()
#1 /homepages/39/d30171830/htdocs/de/wp-includes/template.php(718): load_template('/homepages/39/d...', true, Array)
#2 /homepages/39/d30171830/htdocs/de/wp-includes/general-template.php(48): locate_template(Array, true, true, Array)
#3 /homepages/39/d30171830/htdocs/de/wp-content/themes/grey-opaque/tag.php(8): get_header()
#4 /homepages/39/d30171830/htdocs/de/wp-includes/template-loader.php(106): include('/homepages/39/d...')
#5 /homepages/39/d30171830/htdocs/de/wp-blog-header.php(19): require_once('/homepages/39/d...')
#6 /homepages/39/d30171830/htdocs/de/index.php(17): require('/homepages/39/d...')
#7 {main}
  thrown in <b>/homepages/39/d30171830/htdocs/de/wp-content/themes/grey-opaque/header.php</b> on line <b>11</b><br />