Hello, found two issues in the Rails starter app for Metronic 8.1.7 with the initial default theme and then with jstree.

First, app/views/partials/theme-mode/_init.html.erb has a typo that causes formatting issues until the light, dark, or system theme is selected by the user.

Line 3 of the file is currently set to:
var defaultThemeMode = "{% getModeDefault %}";
but needs to be set to:
var defaultThemeMode = "<%= getModeDefault() %>";

Second, the jstree plugin uses four .png and two .gif files, but the current CSS file doesn't point to those files correctly.

For example, in lib/assets/plugins/custom/jstree/jstree.bundle.css:

#jstree-dnd.jstree-dnd-responsive > .jstree-ok {
 background-image: url("images/jstree/40px.png");
 background-position: 0 -200px;
 background-size: 120px 240px;
 }

#jstree-dnd.jstree-dnd-responsive > .jstree-ok {
 background-image: url("https://cdnjs.cloudflare.com/ajax/libs/jstree/3.3.14/themes/default/40px.png");
 background-position: 0 -200px;
 background-size: 120px 240px;
 }