UI not working, Please help me

Please help me, when I tried to view my site then this UI is appear, what should I do?

Hi @Ali1,

What OJS version are you using?
Are there any relevant errors in PHP logs?
Can you specify what theme plugin are you using? The Default one?

I am using this one. OJS 3.1.2
Yes, theme is default.
I also check with this version. 3.1.1-4, but the result is same.

Do you see anything relevant in the PHP logs?