I cannot preview the local language (Arabic) metadata page

Hi everybody, I installed a journal using the OJS : https://journals.iqsbms.org/index.php/iqasj/index . I installed two languages, English and Arabic. I uploaded one volume with one paper using Quicksubmit plugin.The English Metadata of the published paper cane be previewed correctly: https://journals.iqsbms.org/index.php/iqasj/article/view/1
When I click on the Arabic button “العربية” to preview the Arabic metadat, I get the following Error message:

This page isn’t working
journals.iqsbms.org is currently unable to handle this request.

Any suugestion or advice? pls. Did I miss any seeting?