Lang Not Defined Error

After installation, I get this error on the admin pages.
This is a brand new fresh installation.



ReferenceError: /opt/richplugins/app/views/gpic2.ejs:184
   182|         }
   183|
>> 184|         const lang = '<%= lang %>';
   185|         const GRW_LANGS = {
   186|             ar: 'Arabic',
   187|             bg: 'Bulgarian',

lang is not defined
   at eval ("/opt/richplugins/app/views/gpic2.ejs":15:26)
   at gpic2 (/opt/richplugins/node_modules/ejs/lib/ejs.js:703:17)
   at tryHandleCache (/opt/richplugins/node_modules/ejs/lib/ejs.js:274:36)
   at exports.renderFile [as engine] (/opt/richplugins/node_modules/ejs/lib/ejs.js:491:10)
   at View.render (/opt/richplugins/node_modules/express/lib/view.js:135:8)
   at tryRender (/opt/richplugins/node_modules/express/lib/application.js:657:10)
   at Function.render (/opt/richplugins/node_modules/express/lib/application.js:609:3)
   at ServerResponse.render (/opt/richplugins/node_modules/express/lib/response.js:1049:7)
   at /opt/richplugins/app/gpaw3.js:20:13
   at Layer.handle [as handle_request] (/opt/richplugins/node_modules/express/lib/router/layer.js:95:5)