Horizontal Timeline

Fatal error: Uncaught Error: [] operator not supported for strings in /home/customer/www/dustlessblasting.llc/public_html/wp-content/themes/servicemaster/framework/modules/shortcodes/horizontal-timeline/horizontal-timeline.php:85 Stack trace: #0 /home/customer/www/dustlessblasting.llc/public_html/wp-content/themes/servicemaster/framework/modules/shortcodes/horizontal-timeline/horizontal-timeline.php(62): ServiceMaster\Modules\Shortcodes\HorizontalTimeline\HorizontalTimeline->getDates('[mkd_horizontal...') #1 /home/customer/www/dustlessblasting.llc/public_html/wp-includes/shortcodes.php(433): ServiceMaster\Modules\Shortcodes\HorizontalTimeline\HorizontalTimeline->render(Array, '[mkd_horizontal...', 'mkd_horizontal_...') #2 [internal function]: do_shortcode_tag(Array) #3 /home/customer/www/dustlessblasting.llc/public_html/wp-includes/shortcodes.php(273): preg_replace_callback('/\\[(\\[?)(mkd_ho...', 'do_shortcode_ta...', '[mkd_horizontal...') #4 /home/customer/www/dustlessblasting.llc/public_html/wp-content/themes/servicema in /home/customer/www/dustlessblasting.llc/public_html/wp-content/themes/servicemaster/framework/modules/shortcodes/horizontal-timeline/horizontal-timeline.php on line 85