Exception #0 (Exception): Deprecated Functionality: in WeltPixel/CmsBlockScheduler/Model/ResourceModel/Widget/Instance/Options/Tag.php on line 20

The CMSBlockScheduler is getting an error when I try to open a block. 

We updated Welpixel in July and it was working with no problem. But recently we updated the Magento to 2.4.6
and getting the below error when we try to open a block. What is the solution?

1 exception(s):
Exception #0 (Exception): Deprecated Functionality: Creation of dynamic property WeltPixel\CmsBlockScheduler\Model\ResourceModel\Widget\Instance\Options\Tag::$_resourceModel is deprecated in /public_html/app/code/WeltPixel/CmsBlockScheduler/Model/ResourceModel/Widget/Instance/Options/Tag.php on line 20

Exception #0 (Exception): Deprecated Functionality: Creation of dynamic property WeltPixel\CmsBlockScheduler\Model\ResourceModel\Widget\Instance\Options\Tag::$_resourceModel is deprecated in /public_html/app/code/WeltPixel/CmsBlockScheduler/Model/ResourceModel/Widget/Instance/Options/Tag.php on line 20
<pre>#1 WeltPixel\CmsBlockScheduler\Model\ResourceModel\Widget\Instance\Options\Tag->__construct() called at [vendor/magento/framework/ObjectManager/Factory/AbstractFactory.php:121]
#2 Magento\Framework\ObjectManager\Factory\AbstractFactory->createObject() called at [vendor/magento/framework/ObjectManager/Factory/Compiled.php:108]
#3 Magento\Framework\ObjectManager\Factory\Compiled->create() called at [vendor/magento/framework/ObjectManager/Factory/Compiled.php:150]
#4 Magento\Framework\ObjectManager\Factory\Compiled->get() called at [vendor/magento/framework/ObjectManager/Factory/Compiled.php:79]
#5 Magento\Framework\ObjectManager\Factory\Compiled->create() called at [vendor/magento/framework/ObjectManager/ObjectManager.php:56]