How to update to JEM 4 for Joomla 4 and PHP 8
- Update to JEM 2.3.6
- Make a backup!
- Disable the JEM extensions, all jem plugins, all JEM modules
- (During upgrade process, it suggested to switch to Joomla3 default template "Protostar")
- To prepare the update from Joomla3 to Joomla4, go to Components > Joomla! Updates, choose Options and in Update Channel choose Joomla Next.
- Save.
- Then you get the informations about which other components are not ready. Perhaps I have to disable/uninstall other components/modules/plugins not prepared for Joomla4)
- Update to php 8+
- Then upgrade from Joomla3 to Joomla4.
- Install JEM 4
- Before switching to the frontend, change the positions of the JEM-modules and the main menue, to the positions of your new Joomla4 template (e.g. the Joomla4 default template "cassiopeia"!
- Enable all JEM 4 (component, modules, plugins)
- Adapt the JEM settings (there are changes: e.g. datetime format)
- Check everythink if it works!
- Finish :-)