Hi,
You can’t use shortcodes which output a lot of HTML in the buttons plugin. As you can see the link generated below is not correct HTML. Either put the URl directly into the maxbuttons plugin ( this can be done in the shortcode as well, see examples ) or ask if the other shortcode is able to output *only* an URL to the link you desire and nothing else.
This is the output, which will not work anywhere I suppose –
<a class="maxbutton-25 maxbutton maxbutton-babysitting-schedule-pdf" target="_blank" href="//plymouthfitness.com/download/babysitting-schedule-2/?wpdmdl=7095" >
<div class="media">
<div class="pull-left"><img class="wpdm_icon" alt="Icon" src="https://plymouthfitness.com/wp-content/plugins/download-manager/assets/file-type-icons/pdf.png" onError='this.src="https://plymouthfitness.com/wp-content/plugins/download-manager/assets/file-type-icons/_blank.png";' /></div>
<div class="media-body"><strong class="ptitle">Babysitting Schedule <span class="label label-default" style="font-weight: 400;">419.15 KB</span></strong>
<div><strong><a class='wpdm-download-link wpdm-download-locked [btnclass]' rel='nofollow' href='#' onclick="location.href='https://plymouthfitness.com/download/babysitting-schedule-2/?wpdmdl=7095';return false;">Download</a></strong></div>
</div>
</div>
</div>
<div style="clear: both"></div>
</div>"><span class='mb-text'>Babysitting Schedule PDF</span></a>