I can not install the quickSubmit 184.108.40.206 plugin via the ojs 3.1.2 platform. I upload the plugin myself in the plugins / importexport / quitSubmit folder and it does not appear on the Installed Plugins tab of ojs. How else can I install the quitSubmit 220.127.116.11 plugin on ojs 3.2.1 ??? When I try to install a plug-in via Upload A New Plugin, then ojs issues a "plug-in wasn’t successfully copied. Please make sure that the web server is plugged in. forget to secure it again later. " How to install quitSubmit 18.104.22.168 plugin on ojs 3.2.1 ??? Help, help, help !!!