Problem with edit metadata menu

dear PKP

we are from publisher Universitas Airlangga, we want to ask about a problem in our journal where we can’t edit metadata (Summary menu—>edit metadata—>cannot edit from author name, article title, abstract, to references—>when save metadata jump to website). Our website journal using Open Journal Systems
Please help us to solve this problem and what should we do next?

Thank you very much, hope you are always healthy and happy.