Unable to interact with dropdown using CCS selector

I'm Currently trying to work with a dropdown on Testcafe. I have been struggling to interact with this please see error message provided: 1) The specified selector does not match any element in the DOM tree. > | Selector('.rtv-specialties.btn')

What I'm trying to select

Style sheet

<div class="col-md-6  rtv-specialties"><!--!-->
    <div class="form-group"><!--!-->
                <label class="col-form-label col-form-label-sm  dxbs-fl-cpt" for="Specialties"><!--!-->
                    Specialty<!--!-->
                </label><!--!-->
                <!--!--><!--!-->
                    <div class="dxbs-fl-ctrl"><!--!--><!--!--><!--!--><!--!-->

<div id="ide2d65ebf-ef95-4339-99b5-5f45b4d24c06" class="dxbs-dropdown-edit dxbs-combobox  valid" _bl_401af617-1215-41ca-8a5e-05f4d6d1c311="" data-dispose-id="63754436394711968"><!--!-->
    <!--!--><!--!--><!--!--><div class="input-group input-group-sm dx-listbox"><!--!-->
    <!--!--><!--!-->
        <!--!-->
    <!--!-->
    <div><!--!-->
        <!--!-->
            <!--!--><!--!-->
        <!--!-->
        <input id="Specialties" name="idc97c1635-39d6-4393-ad3c-173d858afa80" type="text" class="form-control form-control-sm dxbs-form-control text-truncate dx-reset-readonly-style" autocomplete="off" readonly="" placeholder="Choose..." data-blured-class="form-control form-control-sm dxbs-form-control dx-reset-readonly-style text-truncate" data-focused-class="form-control form-control-sm dxbs-form-control dx-reset-readonly-style text-truncate" _bl_f4380398-d403-43bb-b216-7f347c17e16d="" style="padding-right: 46.6px;"><!--!-->
        <!--!-->
        <!--!-->
    </div><!--!-->
        <div class="form-control form-control-sm input-group-append dxbs-input-group-append dxbs-focus-hidden" _bl_c0f56011-62d0-48f0-8006-939ec5ba268d=""><!--!-->
            <!--!--><span class="dxbs-feedback "><!--!-->
    <!--!--><!--!--><!--!-->        <button class="btn btn-sm dx-btn dxbs-edit-btn dxbs-clear-btn" id="id09de5a6a-83af-440b-845d-dd975b127628" aria-label="Clear value" tabindex="-1" type="button"><!--!-->
            <!--!-->
        <!--!--><svg class="dx-blazor-clear-button-icon" role="img">
            <use href="#dxsc-clear-button-icon"></use>
        </svg>
    <!--!-->
        </button><!--!-->
<!--!-->
</span><!--!-->
            <!--!-->
            <!--!--><!--!--><!--!-->        <button class="btn btn-sm dx-btn  btn-secondary dxbs-edit-btn dropdown-toggle dxbs-dropdown-toggle" id="id2886515b-19cf-4d4f-b553-534352486075" data-toggle="dropdown-show" aria-haspopup="true" aria-expanded="false" aria-label="Open or close the drop-down window" tabindex="-1" type="button"><!--!-->
            <!--!-->
<!--!-->
                    <span></span><!--!-->
        <!--!-->
        </button><!--!-->
<!--!-->