Error coming in the pagination

support
1 
{{ $paginator := .Paginate (where .Pages "Section" "portfolio") }}
<!---->
{{ range $paginator.Pages }}
<!---->
{{ if eq (mod .Weight 2) 0 }}
<section class="text left" id="p3">
  <div class="container">
    <div class="row justify-content-between">
      <div
        class="col-lg-5 col-md-12 col-sm-12 img"
        ta-aos="fade-down"
        data-aos-delay="200"
      >
        <img
          src="{{ $.Site.BaseURL }}{{ .Params.image }}"
          alt="CTA Image"
          class="img-fluid"
        />
      </div>
      <div
        class="col-lg-7 col-md-12 col-sm-12 p-5"
        ta-aos="fade-up"
        data-aos-delay="100"
      >
        <p><span>{{.Params.tag_bar}}</span></p>
        <h2>{{.Title}}</h2>
        <br />
        <p><strong>{{.Params.sub_title}}</strong></p>
        <br />
        <div class="scontent">{{.Content }}</div>
      </div>
    </div>
  </div>
</section>

<!-- End Text Section -->
{{else}}
<!-- Text sections -->
<section class="text right" id="p2">
  <div class="container">
    <div class="row justify-content-between">
      <div
        class="col-lg-5 col-md-12 col-sm-12 d-block d-lg-none p-5 img"
        ta-aos="fade-down"
        data-aos-delay="200"
      >
        <img
          src="{{ $.Site.BaseURL }}{{ .Params.image }}"
          alt="CTA Image"
          class="img-fluid"
        />
      </div>
      <div
        class="col-lg-7 col-md-12 col-sm-12 p-5"
        ta-aos="fade-up"
        data-aos-delay="100"
      >
        <p><span>{{.Params.tag_bar}}</span></p>
        <h2>{{.Title}}</h2>
        <br />
        <p><strong>{{.Params.sub_title}}</strong></p>
        <br />
        <div class="scontent">{{.Content }}</div>
      </div>

      <div
        class="col-lg-5 col-md-12 col-sm-12 d-none d-lg-block p-5 img"
        ta-aos="fade-down"
        data-aos-delay="200"
      >
        <img
          src="{{ $.Site.BaseURL }}{{.Params.image}}"
          alt="CTA Image"
          class="img-fluid"
        />
      </div>
    </div>
  </div>
</section>
<!-- End Text Section -->
{{end}} {{end}}

Above is my code. When using it it shows this kind of error.

ERROR 2024/04/15 17:14:18 Rebuild failed: failed to render pages: render of "page" failed: "D:\Fiverr Works hugo\2024\official-web\layouts\_default\portfolio.html:16:19": execute of template failed at <$paginator.Pages>: error calling Pages: runtime error: invalid memory address or nil pointer dereference

Help me to solve this.