Error using JA-edenite-ii when compatibility plugin disabled

dawehnes

I am receiving an error message whenever a page is assigned to the JA-edenite-II template style is envoked with the compatibility plugin disabled.

The site is a simple test site with virtually nothing installed besides the base Joomla (originally setup as v5.2.2 but updated to version 5.4) on a Windows PC running WAMPServer.

I have installed the JA-edenite-ii template (v2.1.0), JA-acm (v2.4.2), the T3 system plugin (v3.2.2), JA extension manager (v2.7.6) and JA-login (v2.9.0).

When I set the JA-edenite-ii template style as the default for all pages (just the home page), it works fine with the compatibility plugin (v5.0.0) enabled. But when I disable that plugin I get the following error message:
Class "Joomla\Component\content\Site\Helper\RouteHelper" not found

dawehnes

It seems that someone else has experienced the same problem, but with a different template (shape5). Unfortunately, I cannot read the subsequent posts for that discussion to see how or if it was resolved. (My current subscription is JA Template.)

dawehnes

I have created a new Joomla 5.4 site that is accessible (not localhost).

It is just Joomla with the Joomlart template and extensions loaded. Those extensions include he JA edenite ii template, the T3 plugin, ACM, the extension manager and the JA Login module. I have created a simple, one line, featured article.

The home page loads fine when the default template is set to JA edenite ii with the compatibility plugin active. But if the plugin is disabled, then I get the error Class "Joomla\Component\content\Site\Helper\RouteHelper" not found

This temporary site is
http://tjx.bis.mybluehost.me/website_dce0c377

The super user is joomlart and the password is superuser1234