Error when loading a page

Peoplesoft HCM

Version: 8.60.13

I created a new component and registered. When i went to web browser to see how the page loads, it gives me this error

"First operand of . is NULL, so cannot access member displayAttachmentButtons. (180,236). The first operand of the dot operator is the NULL value, indicating the lack of any object value. As a consequence, the given method or property cannot be used."

I have some peoplecode on my page used to assign fields custom values. And i made sure those field exists on the page. It seems like an initialization problem but i am not sure where it is stemming from