Eclipse Photon (4.8.0) RCP application plug-ins loading issue

Question

I am updating Eclipse RCP application from Indigo(3.7.0) to Photon(4.8.0), and I am facing issue with loading plug-ins.

Eclipse Photon(4.8.0) RCP Application is not able to load Plugins which are copied to the plugin directory unless bundles-info is updated with the plug-in details.

This was working fine in the Indigo version.

Could someone help me in understanding what all needs to be modified apart from updating the required plugins to the latest version ( in my case, to Eclipse photon 4.8)

I am getting an error when I try to launch the RCP application using the existing *.exe and config.ini files Error is displayed as "Ensure that the org.eclipse.core.runtime bundle is resolved and started (see config.ini)."

In Config.ini , the osgi.bundles value is specified as osgi.bundles=org.eclipse.core.runtime@start,\ org.eclipse.equinox.common@start,\ org.eclipse.update.configurator,\ org.eclipse.equinox.launcher.win32.win32.x86

Can I make any changes to load plugins automatically?