Error Message on Podcast Page

Hi there,

I am getting an error/ warning message across the top of my site as follows:

Warning: Illegal offset type in isset or empty in /home/(my directory)/public_html/(mysite).com/wp-includes/post.php on line 1160
class=”wordpress ltr en en-us parent-theme y2015 m06 d02 h15 tuesday logged-in admin-bar plural archive archive- ct-body not-front standard”>

It only comes across the top of the www.(mysite).com/podcast page and nowhere else on the site. Otherwise everything appears to be working normally.

Do you know why I might be receiving this error message and what I would need to do to remove it?

Thank you for your help,

Jade

https://www.ads-software.com/plugins/seriously-simple-podcasting/