while upgrading php from version 5.6 to 7.4.2 i get a critical error on the wp-site:
There has been a critical error on your website.
Learn more about debugging in WordPress.
note: i will run the debug-settings and try to get more insights
Deprecated: Array and string offset access syntax with curly braces is deprecated in /sites/www.my-domain.com/wp-content/plugins/participants-database/classes/PDb_Base.php on line 1844
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Fatal error: Uncaught Exception: Cannot open source device in /sites/www.my-domain.com/wp-content/plugins/participants-database/vendor/wp-session-manager/wp-session-manager.php:46 Stack trace: #0 /sites/www.my-domain.com/wp-content/plugins/participants-database/vendor/wp-session-manager/wp-session-manager.php(46): session_start() #1 /sites/www.my-domain.com/wp-includes/class-wp-hook.php(286): wp_session_manager_start_session() #2 /sites/www.my-domain.com/wp-includes/class-wp-hook.php(312): WP_Hook->apply_filters(NULL, Array) #3 /sites/www.my-domain.com/wp-includes/plugin.php(478): WP_Hook->do_action(Array) #4 /sites/www.my-domain.com/wp-settings.php(392): do_action('plugins_loaded') #5 /sites/www.my-domain.com/wp-config.php(90): require_once('/sites/www.mysite-...') #6 /sites/www.my-domain.com/wp-load.php(37): require_once('/sites/www.mysite-...') #7 /sites/www.my-domain.com/wp-blog-header.php(13): require_once('/sites/www.mysite-...') #8 /sites/www.my-domain.com/index.php(17): require('/sites/www.mysite-...') #9 in /sites/www.my-domain.com/wp-content/plugins/participants-database/vendor/wp-session-manager/wp-session-manager.php on line 46
There has been a critical error on your website.hmm – i try to get more insights
any ideas!?