Front end not rendering properly output looks like this, missing opening div tag.
< class="title-align-left content-align-left bg-color-white content-col-width-75 actions-col-width-25 actions-header-text-small title-text-small paragraph paragraph--type-text-banner-with-links paragraph--view-mode-default ds-1col clearfix">
Issue is in Paragraph, Inline Entity Form, Display Suite somewhere when move to version 5.0@alpha everything works as it should - switch to 3.18 and you get this result. Not sure where to go from here.
Closed: won't fix
3.18
Code
You should probably resave the configuration as the difference between those two branches is immense and not compatible at all. There really isn't anything here I can commit to fix this.