WP RSS Aggregator Error

<b>WP RSS Aggregator</b> has encountered a critical error. The safest course of action is to deactivate the plugin and any of its add-ons on this site using the button below. Once you’ve done that, you may reactivate them and start using the plugins again. If the problem persists, please copy the below error and send it to our support team with an explanation of when and how it happened.

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Error Message:
Argument 1 passed to RebelCode\Entities\Properties\Property::getValue() must implement interface RebelCode\Entities\Api\EntityInterface, null given, called in /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Entities/Properties/WpraItemSourceProperty.php on line 85 (wp-content/plugins/wp-rss-aggregator/lib/Entities/Properties/Property.php:39)
Stack trace:
#0 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Entities/Properties/WpraItemSourceProperty.php(85): RebelCode\Entities\Properties\Property->getValue(NULL)
#1 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/lib/Entities/Entity.php(75): RebelCode\Wpra\Core\Entities\Properties\WpraItemSourceProperty->getValue(Object(RebelCode\Entities\Entity))
#2 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/lib/Entities/Entity.php(145): RebelCode\Entities\Entity->get('source_name')
#3 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Data/EntityDataSet.php(94): RebelCode\Entities\Entity->export()
#4 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Util/IteratorDelegateTrait.php(86): RebelCode\Wpra\Core\Data\EntityDataSet->getIterator()
#5 [internal function]: RebelCode\Wpra\Core\Data\EntityDataSet->rewind()
#6 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Util/IteratorDelegateTrait.php(58): iterator_to_array(Object(RebelCode\Wpra\Core\Data\EntityDataSet))
#7 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Util/IteratorDelegateTrait.php(130): RebelCode\Wpra\Core\Data\AbstractDataSet->yieldIterationValue(Object(RebelCode\Wpra\Core\Data\EntityDataSet))
#8 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/Environment.php(497) : eval()'d code(63): RebelCode\Wpra\Core\Data\AbstractDataSet->current()
#9 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/Template.php(453): __TwigTemplate_12ed1854f78dd0986e75589ad99435d73dd9e3f55306550fc400128c5226be8d->doDisplay(Array, Array)
#10 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/Template.php(420): Twig\Template->displayWithErrorHandling(Array, Array)
#11 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/Template.php(432): Twig\Template->display(Array)
#12 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/Extension/CoreExtension.php(1607): Twig\Template->render(Array)
#13 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/Environment.php(497) : eval()'d code(43): twig_include(Object(Twig\Environment), Array, 'feeds/list/feed...')
#14 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/Template.php(453): __TwigTemplate_43bfdf9d1af1ad8b3fabd55c26437114ed2b154baea5ce824d01bd5fe6e6c70d->doDisplay(Array, Array)
#15 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/Template.php(420): Twig\Template->displayWithErrorHandling(Array, Array)
#16 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/Template.php(432): Twig\Template->display(Array)
#17 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/vendor/twig/twig/src/TemplateWrapper.php(47): Twig\Template->render(Array, Array)
#18 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Templates/TwigTemplate.php(59): Twig\TemplateWrapper->render(Array)
#19 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Templates/Feeds/Types/AbstractFeedTemplateType.php(41): RebelCode\Wpra\Core\Templates\TwigTemplate->render(Array)
#20 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Templates/Feeds/MasterFeedsTemplate.php(172): RebelCode\Wpra\Core\Templates\Feeds\Types\AbstractFeedTemplateType->render(Array)
#21 /home2/fgmediac/public_html/wp-content/plugins/wp-rss-aggregator/src/Handlers/FeedShortcode/FeedsShortcodeHandler.php(48): RebelCode\Wpra\Core\Templates\Feeds\MasterFeedsTemplate->render(Array)
#22 /home2/fgmediac/public_html/wp-includes/shortcodes.php(433): RebelCode\Wpra\Core\Handlers\FeedShortcode\FeedsShortcodeHandler->__invoke(Array, '', 'wp-rss-aggregat...')
#23 [internal function]: do_shortcode_tag(Array)
#24 /home2/fgmediac/public_html/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(wp\\-rs...', 'do_shortcode_ta...', '[wp-rss-aggrega...')
#25 /home2/fgmediac/public_html/wp-content/themes/Extra/includes/builder/class-et-builder-element.php(3100): do_shortcode('[wp-rss-aggrega...')
#26 /home2/fgmediac/public_html/wp-includes/shortcodes.php(433): ET_Builder_Element->_render(Array, '[wp-rss-aggrega...', 'et_pb_code')
#27 [internal function]: do_shortcode_tag(Array)
#28 /home2/fgmediac/public_html/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(wp\\-rs...', 'do_shortcode_ta...', '[et_pb_text _bu...')
#29 /home2/fgmediac/public_html/wp-content/themes/Extra/includes/builder/main-structure-elements.php(3784): do_shortcode('[et_pb_text _bu...')
#30 /home2/fgmediac/public_html/wp-content/themes/Extra/includes/builder/class-et-builder-element.php(3419): ET_Builder_Column->render(Array, '[et_pb_text _bu...', 'et_pb_column', '', '', '', '', '')
#31 /home2/fgmediac/public_html/wp-includes/shortcodes.php(433): ET_Builder_Element->_render(Array, '[et_pb_text _bu...', 'et_pb_column')
#32 [internal function]: do_shortcode_tag(Array)
#33 /home2/fgmediac/public_html/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(wp\\-rs...', 'do_shortcode_ta...', '[et_pb_column t...')
#34 /home2/fgmediac/public_html/wp-content/themes/Extra/includes/builder/main-structure-elements.php(2274): do_shortcode('[et_pb_column t...')
#35 /home2/fgmediac/public_html/wp-content/themes/Extra/includes/builder/class-et-builder-element.php(3419): ET_Builder_Row->render(Array, '[et_pb_column t...', 'et_pb_row', '', '', '', '', '')
#36 /home2/fgmediac/public_html/wp-includes/shortcodes.php(433): ET_Builder_Element->_render(Array, '[et_pb_column t...', 'et_pb_row')
#37 [internal function]: do_shortcode_tag(Array)
#38 /home2/fgmediac/public_html/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(insta\\...', 'do_shortcode_ta...', '[et_pb_row admi...')
#39 /home2/fgmediac/public_html/wp-content/themes/Extra/includes/builder/main-structure-elements.php(1606): do_shortcode('[et_pb_row admi...')
#40 /home2/fgmediac/public_html/wp-content/themes/Extra/includes/builder/class-et-builder-element.php(3419): ET_Builder_Section->render(Array, '[et_pb_row admi...', 'et_pb_section', '', '', '', '', '')
#41 /home2/fgmediac/public_html/wp-includes/shortcodes.php(433): ET_Builder_Element->_render(Array, '[et_pb_row admi...', 'et_pb_section')
#42 [internal function]: do_shortcode_tag(Array)
#43 /home2/fgmediac/public_html/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(insta\\...', 'do_shortcode_ta...', '[et_pb_section ...')
#44 /home2/fgmediac/public_html/wp-content/themes/Extra/includes/layouts.php(147): do_shortcode('[et_pb_section ...')
#45 /home2/fgmediac/public_html/wp-content/themes/Extra/home.php(9): extra_home_layout()
#46 /home2/fgmediac/public_html/wp-includes/template-loader.php(106): include('/home2/fgmediac...')
#47 /home2/fgmediac/public_html/wp-blog-header.php(19): require_once('/home2/fgmediac...')
#48 /home2/fgmediac/public_html/index.php(17): require('/home2/fgmediac...')
#49 {main}