Fatal error with PHP 8.0

I use your plugin on a website which ran on PHP 7.2 for a long time.
Today I upgraded to PHP 8.0. I have installed the latest version of your plugin: 1.8.21
Unfortunately, your plugin causes a fatal error, as can be seen in the following error message:

[15-Feb-2024 07:56:55 UTC] PHP Fatal error: Uncaught TypeError: Unsupported operand types: string + string in /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/photo-gallery/frontend/views/BWGViewThumbnails_masonry.php:305
Stack trace: 0 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/photo-gallery/frontend/views/BWGViewThumbnails_masonry.php(8): BWGViewThumbnails_masonry->inline_styles(0, Object(WD_BWG_Theme), Array) 1 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/photo-gallery/frontend/controllers/controller.php(401): BWGViewThumbnails_masonry->display(Array, 0, false) 2 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/photo-gallery/frontend/controllers/controller.php(396): BWGControllerSite->display(Array, 1, 0) 3 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/photo-gallery/photo-gallery.php(811): BWGControllerSite->execute(Array, 1, 0) 4 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/photo-gallery/photo-gallery.php(791): BWG->front_end(Array) 5 /www/htdocs/w01ddb53/example.de/photography/wp-includes/shortcodes.php(433): BWG->shortcode(Array, ”, ‘Best_Wordpress_…’) 6 [internal function]: do_shortcode_tag(Array) 7 /www/htdocs/w01ddb53/example.de/photography/wp-includes/shortcodes.php(273): preg_replace_callback(‘/[([?)(Best_W…’, ‘do_shortcode_ta…’, ‘[Best_Wordpress…’) 8 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/helpers/helpers.php(265): do_shortcode(‘[Best_Wordpress…’) 9 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/templates/shortcodes/vc_column_text.php(31): wpb_js_remove_wpautop(‘

[Best_Wordpr…’, true) 10 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(457): require(‘/www/htdocs/w01…’) 11 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(430): WPBakeryShortCode->loadTemplate(Array, ‘[Best_Wordpress…’) 12 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(552): WPBakeryShortCode->content(Array, ‘[Best_Wordpress…’) 13 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/helpers/helpers.php(1318): WPBakeryShortCode->output(”, ‘[Best_Wordpress…’) 14 /www/htdocs/w01ddb53/example.de/photography/wp-includes/shortcodes.php(433): vc_do_shortcode(”, ‘[Best_Wordpress…’, ‘vc_column_text’) 15 [internal function]: do_shortcode_tag(Array) 16 /www/htdocs/w01ddb53/example.de/photography/wp-includes/shortcodes.php(273): preg_replace_callback(‘/[([?)(Best_W…’, ‘do_shortcode_ta…’, ‘[vc_column_text…’) 17 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/helpers/helpers.php(265): do_shortcode(‘[vc_column_text…’) 18 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/templates/shortcodes/vc_column.php(94): wpb_js_remove_wpautop(‘[vc_column_text…’) 19 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(457): require(‘/www/htdocs/w01…’) 20 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(430): WPBakeryShortCode->loadTemplate(Array, ‘[vc_column_text…’) 21 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(552): WPBakeryShortCode->content(Array, ‘[vc_column_text…’) 22 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/helpers/helpers.php(1318): WPBakeryShortCode->output(”, ‘[vc_column_text…’) 23 /www/htdocs/w01ddb53/example.de/photography/wp-includes/shortcodes.php(433): vc_do_shortcode(”, ‘[vc_column_text…’, ‘vc_column’) 24 [internal function]: do_shortcode_tag(Array) 25 /www/htdocs/w01ddb53/example.de/photography/wp-includes/shortcodes.php(273): preg_replace_callback(‘/[([?)(Best_W…’, ‘do_shortcode_ta…’, ‘[vc_column][vc_…’) 26 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/helpers/helpers.php(265): do_shortcode(‘[vc_column][vc_…’) 27 /www/htdocs/w01ddb53/example.de/photography/wp-content/themes/kamera/vc-templates/vc_row.php(244): wpb_js_remove_wpautop(‘[vc_column][vc_…’) 28 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(457): require(‘/www/htdocs/w01…’) 29 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/classes/shortcodes/vc-row.php(40): WPBakeryShortCode->loadTemplate(Array, ‘[vc_column][vc_…’) 30 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/classes/shortcodes/core/class-wpbakeryshortcode.php(552): WPBakeryShortCode_Vc_Row->content(Array, ‘[vc_column][vc_…’) 31 /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/js_composer/include/helpers/helpers.php(1318): WPBakeryShortCode->output(Array, ‘[vc_column][vc_…’) 32 /www/htdocs/w01ddb53/example.de/photography/wp-includes/shortcodes.php(433): vc_do_shortcode(Array, ‘[vc_column][vc_…’, ‘vc_row’) 33 [internal function]: do_shortcode_tag(Array) 34 /www/htdocs/w01ddb53/example.de/photography/wp-includes/shortcodes.php(273): preg_replace_callback(‘/[([?)(Best_W…’, ‘do_shortcode_ta…’, ‘

[vc_row use_…’) 35 /www/htdocs/w01ddb53/example.de/photography/wp-includes/class-wp-hook.php(324): do_shortcode(‘

[vc_row use_…’) 36 /www/htdocs/w01ddb53/example.de/photography/wp-includes/plugin.php(205): WP_Hook->apply_filters(‘

[vc_row use_…’, Array) 37 /www/htdocs/w01ddb53/example.de/photography/wp-includes/post-template.php(256): apply_filters(‘the_content’, ‘[vc_row use_row…’) 38 /www/htdocs/w01ddb53/example.de/photography/wp-content/themes/kamera/full-width.php(21): the_content() 39 /www/htdocs/w01ddb53/example.de/photography/wp-includes/template-loader.php(106): include(‘/www/htdocs/w01…’) 40 /www/htdocs/w01ddb53/example.de/photography/wp-blog-header.php(19): require_once(‘/www/htdocs/w01…’) 41 /www/htdocs/w01ddb53/example.de/index.php(17): require(‘/www/htdocs/w01…’) 42 {main} thrown in /www/htdocs/w01ddb53/example.de/photography/wp-content/plugins/photo-gallery/frontend/views/BWGViewThumbnails_masonry.php on line 305

Could you please provide a plugin version with a fix?