Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/gallery/lib/content.php on line 1598

Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/gallery/classes/Mail/htmlMimeMail.php on line 424

Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/gallery/classes/Mail/htmlMimeMail.php on line 440

Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/gallery/classes/Mail/htmlMimeMail.php on line 451

Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/gallery/classes/Mail/htmlMimeMail.php on line 464

Deprecated: Assigning the return value of new by reference is deprecated in /usr/share/gallery/classes/Mail/htmlMimeMail.php on line 478

Gallery seems to be configured, but the path to the albums dir is wrong. Maybe you did a host change?
Check all paths and URLs in your config.php; unfortunately this can't be done via the config wizard.