bug

app/Repositories/PostRepositories.php

@@ -280,7 +280,7 @@ class PostRepositories
                 }
             })
             ->where(function($query) use ($request){
-                if(isset($request['topic_ids'])){
+                if(isset($request['topic_ids']) && $request['topic_ids']){
                     $topicIds = json_decode($request['topic_ids'], true);
                     foreach ($topicIds as $key=>$id) {
                         if ($key==0) {