WP Photo Album Plus

After creating custom fields in WP Photo Album Plus I have been getting the following error for a long time. Who can provide a solution?



Fout details

============

Een fout van het type E_ERROR werd veroorzaakt op regelnummer 1781 van het bestand /var/www/vhosts/oudrhenen.nl/httpdocs/wp-content/plugins/wp-photo-album-plus/wppa-photo-admin-autosave.php. Foutmelding: Uncaught TypeError: array_keys(): Argument #1 ($array) must be of type array, bool given in /var/www/vhosts/oudrhenen.nl/httpdocs/wp-content/plugins/wp-photo-album-plus/wppa-photo-admin-autosave.php:1781

Stack trace:

#0 /var/www/vhosts/oudrhenen.nl/httpdocs/wp-content/plugins/wp-photo-album-plus/wppa-photo-admin-autosave.php(1781): array_keys()

#1 /var/www/vhosts/oudrhenen.nl/httpdocs/wp-content/plugins/wp-photo-album-plus/wppa-album-admin-autosave.php(2152): wppa_album_photos()

#2 /var/www/vhosts/oudrhenen.nl/httpdocs/wp-content/plugins/wp-photo-album-plus/wppa-admin.php(322): _wppa_admin()

#3 /var/www/vhosts/oudrhenen.nl/httpdocs/wp-includes/class-wp-hook.php(324): wppa_admin()

#4 /var/www/vhosts/oudrhenen.nl/httpdocs/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()

#5 /var/www/vhosts/oudrhenen.nl/httpdocs/wp-includes/plugin.php(517): WP_Hook->do_action()

#6 /var/www/vhosts/oudrhenen.nl/httpdocs/wp-admin/admin.php(259): do_action()

#7 {main} ? thrown