Fixed in https://www.ads-software.com/support/topic/255088?replies=21
Thanks to @lilyfan.
From the other thread post by lilyfan:
The fix point is below.
* line 429 of functions.php
<div class=”postcontent<?php if (current_user_can( ‘edit_post’, get_the_id() )) {?> editarea<?}?>”….
should be:
<div class=”postcontent<?php if (current_user_can( ‘edit_post’, get_the_id() )) {?> editarea<?php } ?>”
For me the line was 723.
