I am getting this warning menssage

[DevArge]

Hi im getting this warning in my server each time I login to my wordpress dashboard, I dont know if you guys can add some validation here to stop getting this messages, I really appreciate thanks.

Got error 'PHP message: PHP Warning: Attempt to read property "cap" on null in /public_html/wp-content/themes/my-theme/vendor/johnbillion/extended-cpts/src/PostTypeAdmin.php on line 622; PHP message: PHP Warning: Attempt to read property "edit_posts" on null in /public_html/wp-content/themes/my-theme/vendor/johnbillion/extended-cpts/src/PostTypeAdmin.php on line 622;

[davidarkemp]

I had this, and it's because I had a space in the name of the cpt e.g. ' resource' vs 'resource'...
WordPress only allows hyphen, underscore and alpha-numberical characters as post_type, and silent removes any invalid characters.

[johnbillion]

This also happens when a post type that was previously in use on your site is no longer registered but its posts still exist in your database.