array_merge() does not accept unknown named parameters
Backtrace from Exception
In /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/widgets.php [line 1265]:

1. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/widgets.php [line 1265] calling array_merge()
2. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/widgets.php [line 1220] calling retrieve_widgets()
3. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/class-wp-hook.php [line 289] calling _wp_sidebars_changed()
4. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/class-wp-hook.php [line 311] calling apply_filters()
5. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/plugin.php [line 478] calling do_action()
6. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/theme.php [line 3267] calling do_action()
7. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/class-wp-hook.php [line 287] calling check_theme_switched()
8. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/class-wp-hook.php [line 311] calling apply_filters()
9. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-includes/plugin.php [line 478] calling do_action()
10. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-settings.php [line 547] calling do_action()
11. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-config.php [line 133] calling require_once()
12. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-load.php [line 37] calling require_once()
13. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/wp-blog-header.php [line 13] calling require_once()
14. /is/htdocs/wp10636229_MEYRILPH26/www/wp-neu/index.php [line 17] calling require()