Array is showing as link

Good day,

I have 4 items within my custom post types that I use to link to other pages.

3 of them work correctly, but the 4th one always displays “mydomain.com/Array” for some reason. Is there anything that would cause this?

I have tried changing the post type and the output filter but nothing seems to help.

Thank you

https://www.ads-software.com/plugins/custom-content-type-manager/