Problem with Styx Theme

I’m working with the Styx theme and it’s been smooth sailing until recently. Oddly, an error appears on the top of each page, and the 4- column portfolio disappeared from the home page.

I haven’t worked on the site for a few weeks, and I wonder if after installing updates this could have been the culprit.

This is the error message that appears on the top of each page:

Warning: Missing argument 2 for wpdb::prepare(), called in /home/indiana/public_html/wp/wp-content/themes/styx/plugins/post-types-order/post-types-order.php on line 168 and defined in /home/indiana/public_html/wp/wp-includes/wp-db.php on line 990

Warning: Missing argument 2 for wpdb::prepare(), called in /home/indiana/public_html/wp/wp-content/themes/styx/plugins/post-types-order/post-types-order.php on line 243 and defined in /home/indiana/public_html/wp/wp-includes/wp-db.php on line 990

Which looks like this: https://meditation-indianapolis.org/wp/?page_id=408

As noted above, the other problem is a missing 4-column portfolio that was inserted at the bottom, but is now gone, but still remains on the bottom of all of the other pages as intended. I can’t seem to figure this out. I checked my settings and to see if something funky happened in the page editor, but could find nothing. I’m perplexed. If anyone can help me out, I would be so grateful.

Thanks in advance,
Kara