Error Filemanager when adding image at product section

Hi all, im newbie and want to learn opencart ecommerce for

education purposes.

I have installed OpenCart 2.2 from quickstart package from

other resources not official zip package.

And tried to replace filemanager php/tpl extension but im

still faced this problem

My opinion, just only estimation that the real source that

needed is located at:

admin/index.php?route=common/filemanager

this maybe means from

admin/controller/common/
admin/language/en-gb/common/
admin/view/template/common/

or it's came from another dir? e.g; catalog and system?

Below the error image attached
ERROR SCREENSHOT: https://ibb.co/hm6Hbk

I hope an expert can help me on this case. I don't want

revert to official package but just repair the error.

Thank you so much,

Rismee