Have_posts() does not find posts in my plugin

Ok, i created a plugin to process the text and create custom tags for it. Te problem is that when i call the have_posts() it doesn’t return me anything. i even tried the rewind_posts() before it but nothing changes. Here’s the code:

<?php
add_action( 'admin_menu', 'wp_autoTAG' );

function wp_autoTAG() {
    add_options_page( 'Opciones WP autoTAG', 'Wp autoTAG', 'manage_options', 'wp_autoTAG', 'wp_autoTAG_options' );
}

function wp_autoTAG_options() {
    echo "function wp_autotag_options()";
    if (!current_user_can('manage_options'))
    {
        wp_die( __('Peque?±o padawan... debes utilizar la fuerza para entrar aquí-.') );
    }

    if(isset($_POST['gentags'])) {
      echo "isset(post['gentags'])";
        $limite = $_POST['relevancia'];
        $valuetoken = $_POST['apitoken'];
        $optionapi = get_option('apitoken','0');
        $arraytags = array();
        if(isset($_POST['apitoken'])){
          echo "isset(post['apitoken'])";
          if(!($optionapi === $valuetoken)){
            add_option('apitoken', $valuetoken);
            update_option('apitoken', $valuetoken);
            echo "option added, valor apitoquen guardat";
          }
        }

        //THE LOOP
        rewind_posts();
        if(have_posts()){
          $contador = 0;
          echo "have_posts";
          while(have_posts()){
            echo "bucle $contador";
            $contador += 1;
            if($contador > 4){
              break;
            }
            the_post();

            $post_id = the_ID();
            $content = get_the_content();

            //FUNCIóN DE ANALISIS DE TEXTO

            //ANALISIS DE ENTIDADES
            if(isset($_POST['personas']) || isset($_POST['lugares']) || isset($_POST['organizaciones']) || isset($_POST['otros'])){
              echo "entidades analizadas";
      				$url = 'https://api.monkeylearn.com/v2/extractors/ex_Kc8uzhSi/extract/';
      				$data = array('text_list' => array($content));
      				$options = array(
      				    'http' => array(
      				        'header'  => "Content-type: application/json\r\n".
      				            "Authorization:token $valuetoken\r\n",
      				        'method'  => 'POST',
      				        'content' => json_encode($data),
      				    ),
      				);
      				$context  = stream_context_create($options);
      				$result = file_get_contents($url, false, $context);

      				//var_dump($result);

      				$jsonIterator = new RecursiveIteratorIterator(
      				    new RecursiveArrayIterator(json_decode($result, TRUE)),
      				    RecursiveIteratorIterator::SELF_FIRST);
              $push = false;
      				foreach ($jsonIterator as $key => $val) {
      				    if(is_array($val)) {
      				    }
                  else {
                    if(isset($_POST['personas'])){
                      if($key === 'tag' && $val ==='PERS'){
                        $push = true;
                      }
                    }
                    if(isset($_POST['lugares'])){
                      if($key === 'tag' && $val ==='LUG'){
                        $push = true;
                      }
                    }
                    if(isset($_POST['organizaciones'])){
                      if($key === 'tag' && $val ==='ORG'){
                        $push = true;
                      }
                    }
                    if(isset($_POST['otros'])){
                      if($key === 'tag' && $val ==='OTROS'){
                        $push = true;
                      }
                    }
      			        if($key === 'entity' && $push == true){
      			          $entity = $val;
      			          array_push($arraytags, $entity);
                      $push = false;
      			        }
      				    }
      				}
            }
            if(isset($_POST['keywords'])){
              echo "analisis de palabras clave";
      				//ANALISIS DE KEYWORDS CON RELEVANCIA

              $limite = $_POST['relevancia'];
      				$url = 'https://api.monkeylearn.com/v2/extractors/ex_eV2dppYE/extract/';
      				$data = array('text_list' => array($content));
      				$options = array(
      				    'http' => array(
      				        'header'  => "Content-type: application/json\r\n".
      				            "Authorization:token $valuetoken\r\n",
      				        'method'  => 'POST',
      				        'content' => json_encode($data),
      				    ),
      				);
      				$context  = stream_context_create($options);
      				$result2 = file_get_contents($url, false, $context);
      				$jsonIterator = new RecursiveIteratorIterator(
      				    new RecursiveArrayIterator(json_decode($result2, TRUE)),
      				    RecursiveIteratorIterator::SELF_FIRST);

      				foreach ($jsonIterator as $key => $val) {
      				    if(is_array($val)) {
      				    }
      				    else {
      				        //COMPROBAR RELEVANCIA POR ENCIMA DEL LIMITE ESTABLECIDO

      				        if($key ==='relevance'){
      				          if(floatval($val) > floatval($limite)){
      				            $push = true;
      				          }
      				          else{
      				            $push = false;
      				          }
      				        }
      				        //A?ADIR KEYWORDS RELEVANTES AL ARRAY
      				        if($key ==='keyword'){
      				          if($push == true){
      				            array_push($arraytags, $val);
      				          }
      				        }
      				    }
      				}
            } // final de if(isset(post[keywords]))
            wp_set_post_tags( $post_id, $arraytags);
          }// final while(have posts())
        }//FINAL THE LOOP
        else{
          echo "no_have_posts";
        }

        ?>
            <div class="updated">
                <p>
                    <strong>
                        <?php _e('TAGS generados'); ?>
                    </strong>
                </p>
            </div>
        <?php

      }
    echo '<div class="wrap">';

    echo "<h2>" . __( 'auto TAG') . "</h2>";
    $optionapi = get_option('apitoken','0');
    ?>
    <form name="form1" method="post" action="">
      <fieldset style="border:solid black 1px; padding: 15px;">
      <p style="margin:0 1em 0 2em;">
        <h3><span style="margin-right:1em;"> Clave de API</span></h3>
          <input type="text" name="apitoken" size="42" value="<?php echo $optionapi ?>"/></br>
           Si no dispone de Clave puede conseguir una <a href="https://app.monkeylearn.com/accounts/register/">aquí</a>
      </p>
    </fieldset>
      <fieldset style="border:solid black 1px; padding: 15px;">
        <p style="margin:0 1em 0 2em;">
          <h3><span style="margin-right:1em;"> TAGS por palabra clave</span> <input type="checkbox" name="keywords"/></h3>
            <?php _e("Relevancia mínima: "); ?>
            <input type="number" name="relevancia" min="0.1" max="1" step="0.1" value="0.5"/>
        </p>
      </fieldset>
      <fieldset style="border:solid black 1px; padding: 15px;">
        <p style="margin:0 1em 0 2em;">
          <h3> TAGS por entidades</h3>
          <ul style="width:100%; list-style:none; margin:0; padding:0; float:left; text-align: left;">
            <li style="float:left; width:25%; margin:0; paddind:0; list-style: none;">
              <input type="checkbox" name="personas"/>
              <?php _e("PERSONAS"); ?>
            </li>
            <li style="float:left; width:25%; margin:0; paddind:0; list-style: none;">
              <input type="checkbox" name="lugares"/>
              <?php _e("LUGARES"); ?>
            </li>
            <li style="float:left; width:25%; margin:0; paddind:0; list-style: none;">
              <input type="checkbox" name="organizaciones"/>
              <?php _e("ORGANIZACIONES"); ?>
            </li>
            <li style="float:left; width:25%; margin:0; paddind:0; list-style: none;">
              <input type="checkbox" name="otros"/>
              <?php _e("OTROS"); ?>
            </li>
        </ul>
        </p>
      </fieldset>
      <p class="submit">
          <input type="submit" name="gentags" class="button-primary" value="Generar TAGS" />
      </p>
    </form>
</div>

<?php
var_dump($arraytags);
}

?>