PHP Version

Hello,
on all our sites we got this problems from php 7.2 to 7.4, it only works till 7.1

How can this be fixed?
I also cannot see the Media side at admin panel, it is empty.
I already saw a topic with this but without answer

Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php on line 127

Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php on line 127

Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php on line 127

Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php on line 127

Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php on line 127

Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php on line 127

Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php on line 127

Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php on line 127

Warning: count(): Parameter must be an array or an object that implements Countable in /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php on line 127

Warning: Cannot modify header information – headers already sent by (output started at /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php:127) in /homepages/16/d679043420/htdocs/wp-admin/includes/misc.php on line 1252

Warning: Cannot modify header information – headers already sent by (output started at /homepages/16/d679043420/htdocs/wp-content/themes/inovado/admin/functions/functions.mediauploader.php:127) in /homepages/16/d679043420/htdocs/wp-admin/admin-header.php on line 9

Ticket