Journal OJS 3 Error in menu sidebar and mising footer

Hi Sir, May I ask you a question?
Can you help me! My Web Journal OJS 3 just an error, i.e. the sidebar menu and the footer menu section are missing. I use the default theme Manuscript. and after an error I tried to restore the theme and settings in the css file but still nothing changed. why my OJS 3 Journal website suddenly has an Error on the sidebar menu and disappears at the bottom(footer) of the menu. help me please, my friend.

this is my url journal http://ejournal.aeji-institute.com/index.php/ILRJ

and this is the normal appearance of my journal before it breaks or disappears sidebar menu and footer section

thanks you,
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