fix tabbed content issue

readme.txt

@@ -156,7 +156,8 @@ That's it. You're done!
 * IMPROVE: Change default counter, and label font size in the counter block.
 * FIX: Counter bug when change animation.
 * FIX: Advanced heading not working in table of content.
-* FIX: Image slider not showing properly in row block
+* FIX: Image slider not showing properly in row block.
+* FIX: Anchor issue in tabbed content block.
 * PRO: NEW: Load more pagination in post grid.
 * PRO: FIX: Schema indexing error Bad escape sequence in string in review block.
 

src/blocks/tabbed-content/block.php

@@ -40,7 +40,7 @@ function ub_render_tabbed_content_block($attributes, $contents){
 
     foreach ($contents as $key => $content) {
         if($useAnchors){
-            if($tabsAnchor[$key] !== ''){
+            if(isset($tabsAnchor[$key]) && $tabsAnchor[$key] !== ''){
                 $content->{'data-tab-anchor'} = $tabsAnchor[$key];
             }
         }