Unsupported operand types: string after server upgrade to PHP8.0

Hi There,

I had to disable the pro plugin as I was getting lots of errors after our update to PHP8.0

2021/03/13 11:00:35 [error] 19154#19154: *59 FastCGI sent in stderr: "PHP message: PHP Fatal error:  Uncaught TypeError: Unsupported operand types: string - int in /wp-content/plugins/fv-player-pro/fv-player-pro.class.php:3582

Stack trace:

#0 /wp-includes/class-wp-hook.php(292): FV_Player_Pro->video_ads()
#1 /wp-includes/plugin.php(212): WP_Hook->apply_filters()
#2 /wp-content/plugins/fv-wordpress-flowplayer/models/flowplayer.php(1113): apply_filters()
#3 /wp-content/plugins/fv-wordpress-flowplayer/models/flowplayer-frontend.php(225): flowplayer->build_playlist()
#4 /wp-content/plugins/fv-wordpress-flowplayer/controller/shortcodes.php(195): flowplayer_frontend->build_min_player()
#5 /wp-includes/shortcodes.php(343): flowplayer_content_handle()
#6 [internal function]: do_shortcode_tag()
#7 /wp-includes/shortcodes.php(218): preg_replace_callback()
#8 /wp-content/plugins/elementor/includes/wi" while reading response header from upstream, client: 172.31.49.9, server: xxxxxxxxx.com, request: "GET /xxxxxxxxx/ HTTP/1.1", upstream: "fastcgi://unix:/run/php/php8.0-fpm.sock:", host: "xxxxxxxxx.com"

Any help would be appreciated.