Hi!
We just upgraded from ojs 3.1 to latest stable version (installed master branch on github) following recomended steps. and now header on administrator panel is not loading actually there’s a problem with jquery.
on console we see this
Uncaught TypeError: Cannot read property ‘prototype’ of undefined
at pkp.min.js?v=3.1.2.1:401
at pkp.min.js?v=3.1.2.1:407