Break Page

I am trying to set up the Instagram slider but when I add a shortcode on the homepage, it’s breaking the hhomepage.
I have checked “class-wis_instagram_slider.php” line number 910 under $images_data foreach this function called “$output .= $this->get_template( $template, $template_args );”
If I add echo ‘

'; var_dumb($output); echo '

‘; exit then its showing data but once I remove this then whole page breaks without any error.
Please let me know how can I fix the same.
In array, only 11x Instagram post but looks like it’s going on infinite loop.