Error when logging in as an author

Hi,
When I login as an author, I get this error:
Warning: array_keys() expects parameter 1 to be array, null given in /home/monopol/public_html/wp-content/plugins/ultimate-branding/ultimate-branding-files/modules/remove-wp-dashboard-widgets.php on line 104

Warning: Invalid argument supplied for foreach() in /home/monopol/public_html/wp-content/plugins/ultimate-branding/ultimate-branding-files/modules/remove-wp-dashboard-widgets.php on line 104

Warning: Cannot modify header information - headers already sent by (output started at /home/monopol/public_html/wp-content/plugins/ultimate-branding/ultimate-branding-files/modules/remove-wp-dashboard-widgets.php:104) in /home/monopol/public_html/wp-includes/option.php on line 563

Warning: Cannot modify header information - headers already sent by (output started at /home/monopol/public_html/wp-content/plugins/ultimate-branding/ultimate-branding-files/modules/remove-wp-dashboard-widgets.php:104) in /home/monopol/public_html/wp-includes/option.php on line 564
Can you please help?
Thanks,
Yonatan