Immocaster does not run 4.5.1?

Hi there,

I am using WP 4.5.1 an would like to use the Immocaster Plugin. But when I try to activate this plugin I get this report:

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /html/wordpress/wp-content/plugins/immocaster/lib/Immocaster/Data/Mysql.php:105 Stack trace: #0 /html/wordpress/wp-content/plugins/immocaster/lib/Immocaster/Data/Mysql.php(80): Immocaster_Data_Mysql->connectDatabase(Array) #1 /html/wordpress/wp-content/plugins/immocaster/lib/Immocaster/Data/Mysql.php(61): Immocaster_Data_Mysql->__construct(Array, NULL) #2 /html/wordpress/wp-content/plugins/immocaster/lib/Immocaster/Sdk.php(145): Immocaster_Data_Mysql::getInstance(Array, NULL) #3 /html/wordpress/wp-content/plugins/immocaster/lib/immocaster.php(27): Immocaster_Sdk->setDataStorage(Array) #4 /html/wordpress/wp-content/plugins/immocaster/lib/immocaster.php(17): ImmocasterSDK->__construct(‘is24precheck’) #5 /html/wordpress/wp-content/plugins/immocaster/immocaster.php(160): ImmocasterSDK::getInstance(‘is24precheck’) #6 /html/wordpress/wp-admin/includes/plugin.php(1934): include(‘/html/wordpress…’) #7 /html/wordpress/wp-admin/plugins.php(164): plugin_san in /html/wordpress/wp-content/plugins/immocaster/lib/Immocaster/Data/Mysql.php on line 105

Tried to activate it on an older WP Version (4.4.2) an it works. Can you help me?

https://ww.wp.xz.cn/plugins/immocaster/