It looks like you either have no or a wrong access token.
Please go to Semplice -> General Settings and setup your access token.
Error Message from Instagram: This endpoint has been retired
[unex_ce_instagram id="content_imfueljgr" count="33" span="span4" is_fluid="no" remove_gutter="no" target="dribbble" random="span3.span6"][/ce_instagram]