Not working with Sentinel package

[riksnelders]

FatalErrorException in
SudoSu.php line 34
:
syntax error, unexpected 'return' (T_RETURN), expecting identifier (T_STRING)

EDIT: This was a php 5.6 error .. 7 is needed.
getting following now

Trying to get property of non-object (View: /var/www/clients/client0/web232/web/vendor/viacreative/sudo-su/resources/views/user-selector.blade.php) (View: /var/www/clients/client0/web232/web/vendor/viacreative/sudo-su/resources/views/user-selector.blade.php) (View: /var/www/clients/client0/web232/web/vendor/viacreative/sudo-su/resources/views/user-selector.blade.php) (View: /var/www/clients/client0/web232/web/vendor/viacreative/sudo-su/resources/views/user-selector.blade.php)