[OJS] Unable to install (or upgrade) plugin via plugin gallery

I just installed the latest version of ojs, OJS
I tried to install the plugin for my new OJS through the plugin gallery. but when I click install and then a pop up appears as shown below, and then i click “ok”, but the “ok” button doesn’t process anything. please help me.

Hi @Misbakhul_Akbar,

Check your PHP error log for details.

Alec Smecher
Public Knowledge Project Team