Issue with custom posts in new theme

I have a new theme that I’m trying out that is using breadcrumbs without a plugin and I think its causing this issue when trying to call a custom post type post.
Catchable fatal error: Object of class WP_Error could not be converted to string in ..../html/home/wp-content/themes/***/lib/custom.lib.php on line 157

So the issue here that I’m having is…is this the issue or am I not doing something right? I’ve duplicated the single.php for the “projects” custom type to single-projects.php and created a page named Projects.

I have also created a dummy article that gave me the above code when I tried to view it. Also, I have to type in the address, as its not showing on the created Projects page.

I’m sure I’m not doing something right here.