Hello and thanks for carrying.
It doesn’t matter how many files I chose, first attemt fails. I love to add several images at once but at the moment I only do one by one.
Here is the php log, I just anonymized the user:
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "[14-Jun-2021 12:44:33 UTC] PHP Fatal error: Uncaught ValueError: Path cannot be empty in /var/www/virtual/<user>/html/wp-content/plugins/photo-gallery/filemanager/UploadHandler.php:541"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "Stack trace:"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#0 /var/www/virtual/<user>/html/wp-content/plugins/photo-gallery/filemanager/UploadHandler.php(541): getimagesize('')"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#1 /var/www/virtual/<user>/html/wp-content/plugins/photo-gallery/filemanager/UploadHandler.php(694): bwg_UploadHandler->handle_image_file('/var/www/virtua...', Object(stdClass))"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#2 /var/www/virtual/<user>/html/wp-content/plugins/photo-gallery/filemanager/UploadHandler.php(995): bwg_UploadHandler->handle_file_import('AA011-Altenahr-...', 'AA011-Altenahr-...')"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#3 /var/www/virtual/<user>/html/wp-content/plugins/photo-gallery/filemanager/UploadHandler.php(152): bwg_UploadHandler->post()"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#4 /var/www/virtual/<user>/html/wp-content/plugins/photo-gallery/filemanager/UploadHandler.php(136): bwg_UploadHandler->initialize()"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#5 /var/www/virtual/<user>/html/wp-content/plugins/photo-gallery/filemanager/UploadHandler.php(26): bwg_UploadHandler->__construct(Array)"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#6 /var/www/virtual/<user>/html/wp-content/plugins/photo-gallery/photo-gallery.php(967): require_once('/var/www/virtua...')"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#7 /var/www/virtual/<user>/html/wp-includes/class-wp-hook.php(292): BWG->bwg_UploadHandler('')"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#8 /var/www/virtual/<user>/html/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters('', Array)"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#9 /var/www/virtual/<user>/html/wp-includes/plugin.php(484): WP_Hook->do_action(Array)"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#10 /var/www/virtual/<user>/html/wp-admin/admin-ajax.php(187): do_action('wp_ajax_bwg_Upl...')"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: "#11 {main}"
[14-Jun-2021 14:44:33] WARNING: [pool www] child 25785 said into stderr: " thrown in /var/www/virtual/<user>/html/wp-content/plugins/photo-gallery/filemanager/UploadHandler.php on line 541"
The file’s name and location in this case is “wp-content/uploads/AA011-Altenahr-im-Fruehling.jpg”. The other are similar.