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;