Notice: Trying to access array offset on value of type bool… (Error message)

I am currently using a Blog – Grid template view to display a collection of different blog posts. However, I am receiving this error message within the blog post results on the webpage:

“Notice: Trying to access array offset on value of type bool in
/home4/stratgt6/public_html/mheds/stagingsite/wp-content/themes/HighendWP/functions/theme-thumbnails-resize.php
on line
126”

Most of the other posts display correctly with their respective featured images. I will attach a screenshot of the error for reference. Here is some additional information on the different versions I am using.

Wordpress Version: 6.5.5
PHP Version: 7.4
Highend Version: 4.0.2

Any help or suggestions on ways I can resolve this is greatly appreciated. Thank you!