array(60) {
  ["status"] => string(1) "1"
  ["entity_id"] => string(5) "29994"
  ["attribute_set_id"] => string(1) "4"
  ["type_id"] => string(12) "configurable"
  ["created_at"] => string(19) "2014-06-24 14:12:22"
  ["updated_at"] => string(19) "2018-04-25 08:55:07"
  ["sku"] => string(5) "Σ106"
  ["cat_index_position"] => string(1) "0"
  ["case"] => NULL
  ["cost"] => NULL
  ["crystal"] => NULL
  ["description"] => NULL
  ["diametros"] => NULL
  ["egguisi"] => NULL
  ["ekptosi"] => NULL
  ["ekptosi_value"] => NULL
  ["gift_message_available"] => NULL
  ["has_options"] => string(1) "0"
  ["image"] => string(36) "/1/0/106------200--------85--1_2.jpg"
  ["image_label"] => NULL
  ["koumpoma"] => NULL
  ["leitourgies"] => NULL
  ["le_ceb1ceb4ceb9ceacceb2"] => NULL
  ["le_ceb4ceadcf83ceb9cebc"] => NULL
  ["le_cebcceb7cf87ceb1cebd"] => NULL
  ["le_cf87cf81cf8ecebcceb1"] => NULL
  ["links_exist"] => NULL
  ["links_purchased_separately"] => NULL
  ["links_title"] => NULL
  ["mgs_brand"] => NULL
  ["mgs_brand_value"] => NULL
  ["mgs_j360"] => NULL
  ["msrp"] => NULL
  ["msrp_display_actual_price_type"] => NULL
  ["name"] => string(48) "Στέφανα γάμου Σ106 ασημένια"
  ["news_from_date"] => NULL
  ["news_to_date"] => NULL
  ["price"] => string(8) "200.0000"
  ["price_type"] => NULL
  ["price_view"] => NULL
  ["required_options"] => string(1) "0"
  ["search_weight"] => string(1) "0"
  ["short_description"] => string(753) "Χειροποίητα στέφανα γάμου σε ασήμι 925 ή επάργυρα, δεμένα με λευκή οργάντζα.
<br />
<br />Τα επάργυρα στάφανα που θα επιλέξετε δεν διαφέρουν στην εμφάνιση αλλα ούτε και στην αντοχή τους στο χρόνο.
<br /><span style="color: #ff0000;"><strong>ΔΩΡΟ</strong></span> 2 καρφίτσες πέτου από κρύσταλλα Swarovski (για το γαμπρό &amp; τον κουμπάρο)
<br />
<br />Συνοδεύονται από εγγύηση και το κουτί-στεφανοθήκη πολυτελείας.
<br />
<br />Χρόνος παράδοσης 10-15 ημέρες.
<br />
<br />&nbsp;"
  ["sku_type"] => NULL
  ["small_image"] => string(36) "/1/0/106------200--------85--1_2.jpg"
  ["small_image_label"] => NULL
  ["special_from_date"] => NULL
  ["special_price"] => NULL
  ["special_to_date"] => NULL
  ["swatch_image"] => NULL
  ["tax_class_id"] => string(1) "0"
  ["thumbnail"] => string(36) "/1/0/106------200--------85--1_2.jpg"
  ["thumbnail_label"] => NULL
  ["url_key"] => string(27) "stefana-gamou-s106-asimenia"
  ["url_path"] => NULL
  ["visibility"] => string(1) "4"
  ["weight"] => string(6) "0.0000"
  ["weight_type"] => NULL
  ["xroma_desimatos"] => NULL
  ["is_salable"] => string(1) "1"
}

Fatal error: Uncaught Error: Call to a member function getValue() on null in /home/goldyadmin/public_html/app/code/Mageplaza/GoogleTagManager/Block/TagManager.php:361 Stack trace: #0 /home/goldyadmin/public_html/app/code/Mageplaza/GoogleTagManager/Block/TagManager.php(184): Mageplaza\GoogleTagManager\Block\TagManager->getUniqueId('29994') #1 /home/goldyadmin/public_html/var/view_preprocessed/pub/static/app/code/Mageplaza/GoogleTagManager/view/frontend/templates/gtm.phtml(1): Mageplaza\GoogleTagManager\Block\TagManager->getPageInfo() #2 /home/goldyadmin/public_html/vendor/magento/framework/View/TemplateEngine/Php.php(59): include('/home/goldyadmi...') #3 /home/goldyadmin/public_html/vendor/magento/framework/View/Element/Template.php(270): Magento\Framework\View\TemplateEngine\Php->render(Object(Mageplaza\GoogleTagManager\Block\TagManager\Interceptor), '/home/goldyadmi...', Array) #4 /home/goldyadmin/public_html/vendor/magento/framework/Interception/Interceptor.php(58): Magento\Framework\View\Element\Template->fetchView('/h in /home/goldyadmin/public_html/app/code/Mageplaza/GoogleTagManager/Block/TagManager.php on line 361